C Program To Display Right Angled Triangle With Alphabets, using For Loop

Lets write a C program to display/print/output a right angled triangle pattern formed with Capital Letter English Alphabets, using nested for loop.

Related Read:
Nested For Loop In C Programming Language
C Program To Display Right Angled Triangle With Alphabets, using While Loop

Expected Output for the Input

If user enters number of rows as 5. Then our C program prints a Right angled Triangle with 5 rows of Capital Letter English Alphabets in it.

User Input:
num = 5;

Output:

A
B C
D E F
G H I J
K L M N O

Video Tutorial: C Program To Display Right Angled Triangle With Alphabets, using For Loop


[youtube https://www.youtube.com/watch?v=WYDm6zrPhkg]

YouTube Link: https://www.youtube.com/watch?v=WYDm6zrPhkg [Watch the Video In Full Screen.]

Logic To Display Right Angled Triangle With Alphabets, using For Loop

If we take a closer look at the right angled triangle, we can see that the number of rows and the number of elements in that row are same. Example, row number 5 has 5 elements. Row number 6 has 6 elements etc. So we store this number in a variable called row. Since row starts from 1, we initialize the variable row to 1.

Outer For Loop

We ask the user to enter the maximum number of rows for the right angled triangle, and store it in address of variable num. Outer for loop selects the row. Outer for loop executes until row value is less than or equal to the user entered number.

Inner For Loop

Inner For loop prints the Alphabets. Printing starts from 1st position. So we initialize variable col to 1. And inner for loop iterates until col is less than or equal to the value present in variable row.

Inside inner for loop we check if the value of variable count is 91(ASCII Value of Z is 91). If true, we resent the value of count to 65(ASCII Value of A is 65).

Note: Row number is equal to the number of elements present in that row.

Source Code: C Program To Display Right Angled Triangle With Alphabets, using For Loop

#include<stdio.h>

int main()
{
    int num, row, col, count = 65;

    printf("Enter no of rows\n");
    scanf("%d", &num);

    printf("\n");
    for(row = 1; row <= num; row++)
    {
        for(col = 1; col <= row; col++)
        {
            if(count == 91)
                count = 65;

            printf("%c  ", count++);
        }
        printf("\n");
    }

    return 0;
}

Output 1:
Enter no of rows
5

A
B C
D E F
G H I J
K L M N O

Output 2:
Enter no of rows
10

A
B  C
D  E  F
G  H  I  J
K  L  M  N  O
P  Q  R  S  T  U
V  W  X  Y  Z  A  B
C  D  E  F  G  H  I  J
K  L  M  N  O  P  Q  R  S
T  U  V  W  X  Y  Z  A  B  C

Related Read:
C Program To Print All ASCII Characters and Value using For Loop

ASCII value of A is 65

ASCII value of B is 66

ASCII value of C is 67

ASCII value of D is 68

ASCII value of E is 69

ASCII value of F is 70

ASCII value of G is 71

ASCII value of H is 72

ASCII value of I is 73

ASCII value of J is 74

ASCII value of K is 75

ASCII value of L is 76

ASCII value of M is 77

ASCII value of N is 78

ASCII value of O is 79

ASCII value of P is 80

ASCII value of Q is 81

ASCII value of R is 82

ASCII value of S is 83

ASCII value of T is 84

ASCII value of U is 85

ASCII value of V is 86

ASCII value of W is 87

ASCII value of X is 88

ASCII value of Y is 89

ASCII value of Z is 90

For list of all c programming interviews / viva question and answers visit: C Programming Interview / Viva Q&A List

For full C programming language free video tutorial list visit:C Programming: Beginner To Advance To Expert

C Program To Print All ASCII Characters and Value using For Loop

Lets write a C program to print/display all ASCII characters and its corresponding value using For loop.

Note: In C programming language, every alphabet, number and symbol has corresponding ASCII value(a integer number representing the character).

In C programming language, there are 256 ASCII Characters and ASCII Values. i.e., from 0 to 255.

Related Read:
For Loop In C Programming Language
C Program To Print All ASCII Characters and Value

Video Tutorial: C Program To Print All ASCII Characters and Value using For Loop


[youtube https://www.youtube.com/watch?v=xTRbser_9us]

YouTube Link: https://www.youtube.com/watch?v=xTRbser_9us [Watch the Video In Full Screen.]

Source Code: C Program To Print All ASCII Characters and Value using For Loop

#include<stdio.h>

int main()
{
    int count;

    for(count = 0; count <= 255; count++)
    {
        printf("ASCII value of %c is %d\n", count, count);
    }

    return 0;
}

Output
ASCII value of is 0

ASCII value of is 1

ASCII value of is 2

ASCII value of is 3

ASCII value of is 4

ASCII value of is 5

ASCII value of is 6

ASCII value of is 7

ASCII value of is 8

ASCII value of is 9

ASCII value of
is 10

ASCII value of is 11

ASCII value of is 12

is 13

ASCII value of is 14

ASCII value of is 15

ASCII value of is 16

ASCII value of is 17

ASCII value of is 18

ASCII value of is 19

ASCII value of is 20

ASCII value of § is 21

ASCII value of is 22

ASCII value of is 23

ASCII value of is 24

ASCII value of is 25

ASCII value of is 26

ASCII value of is 27

ASCII value of is 28

ASCII value of is 29

ASCII value of is 30

ASCII value of is 31

ASCII value of is 32

ASCII value of ! is 33

ASCII value of is 34

ASCII value of # is 35

ASCII value of $ is 36

ASCII value of % is 37

ASCII value of & is 38

ASCII value of is 39

ASCII value of ( is 40

ASCII value of ) is 41

ASCII value of * is 42

ASCII value of + is 43

ASCII value of , is 44

ASCII value of is 45

ASCII value of . is 46

ASCII value of / is 47

ASCII value of 0 is 48

ASCII value of 1 is 49

ASCII value of 2 is 50

ASCII value of 3 is 51

ASCII value of 4 is 52

ASCII value of 5 is 53

ASCII value of 6 is 54

ASCII value of 7 is 55

ASCII value of 8 is 56

ASCII value of 9 is 57

ASCII value of : is 58

ASCII value of ; is 59

ASCII value of < is 60

ASCII value of = is 61

ASCII value of > is 62

ASCII value of ? is 63

ASCII value of @ is 64

ASCII value of A is 65

ASCII value of B is 66

ASCII value of C is 67

ASCII value of D is 68

ASCII value of E is 69

ASCII value of F is 70

ASCII value of G is 71

ASCII value of H is 72

ASCII value of I is 73

ASCII value of J is 74

ASCII value of K is 75

ASCII value of L is 76

ASCII value of M is 77

ASCII value of N is 78

ASCII value of O is 79

ASCII value of P is 80

ASCII value of Q is 81

ASCII value of R is 82

ASCII value of S is 83

ASCII value of T is 84

ASCII value of U is 85

ASCII value of V is 86

ASCII value of W is 87

ASCII value of X is 88

ASCII value of Y is 89

ASCII value of Z is 90

ASCII value of [ is 91

ASCII value of \ is 92

ASCII value of ] is 93

ASCII value of ^ is 94

ASCII value of _ is 95

ASCII value of ` is 96

ASCII value of a is 97

ASCII value of b is 98

ASCII value of c is 99

ASCII value of d is 100

ASCII value of e is 101

ASCII value of f is 102

ASCII value of g is 103

ASCII value of h is 104

ASCII value of i is 105

ASCII value of j is 106

ASCII value of k is 107

ASCII value of l is 108

ASCII value of m is 109

ASCII value of n is 110

ASCII value of o is 111

ASCII value of p is 112

ASCII value of q is 113

ASCII value of r is 114

ASCII value of s is 115

ASCII value of t is 116

ASCII value of u is 117

ASCII value of v is 118

ASCII value of w is 119

ASCII value of x is 120

ASCII value of y is 121

ASCII value of z is 122

ASCII value of { is 123

ASCII value of | is 124

ASCII value of } is 125

ASCII value of ~ is 126

ASCII value of  is 127

ASCII value of Ç is 128

ASCII value of ü is 129

ASCII value of é is 130

ASCII value of â is 131

ASCII value of ä is 132

ASCII value of à is 133

ASCII value of å is 134

ASCII value of ç is 135

ASCII value of ê is 136

ASCII value of ë is 137

ASCII value of è is 138

ASCII value of ï is 139

ASCII value of î is 140

ASCII value of ì is 141

ASCII value of Ä is 142

ASCII value of Å is 143

ASCII value of É is 144

ASCII value of æ is 145

ASCII value of Æ is 146

ASCII value of ô is 147

ASCII value of ö is 148

ASCII value of ò is 149

ASCII value of û is 150

ASCII value of ù is 151

ASCII value of ÿ is 152

ASCII value of Ö is 153

ASCII value of Ü is 154

ASCII value of ¢ is 155

ASCII value of £ is 156

ASCII value of ¥ is 157

ASCII value of is 158

ASCII value of ƒ is 159

ASCII value of á is 160

ASCII value of í is 161

ASCII value of ó is 162

ASCII value of ú is 163

ASCII value of ñ is 164

ASCII value of Ñ is 165

ASCII value of ª is 166

ASCII value of º is 167

ASCII value of ¿ is 168

ASCII value of is 169

ASCII value of ¬ is 170

ASCII value of ½ is 171

ASCII value of ¼ is 172

ASCII value of ¡ is 173

ASCII value of « is 174

ASCII value of » is 175

ASCII value of is 176

ASCII value of is 177

ASCII value of is 178

ASCII value of is 179

ASCII value of is 180

ASCII value of is 181

ASCII value of is 182

ASCII value of is 183

ASCII value of is 184

ASCII value of is 185

ASCII value of is 186

ASCII value of is 187

ASCII value of is 188

ASCII value of is 189

ASCII value of is 190

ASCII value of is 191

ASCII value of is 192

ASCII value of is 193

ASCII value of is 194

ASCII value of is 195

ASCII value of is 196

ASCII value of is 197

ASCII value of is 198

ASCII value of is 199

ASCII value of is 200

ASCII value of is 201

ASCII value of is 202

ASCII value of is 203

ASCII value of is 204

ASCII value of is 205

ASCII value of is 206

ASCII value of is 207

ASCII value of is 208

ASCII value of is 209

ASCII value of is 210

ASCII value of is 211

ASCII value of is 212

ASCII value of is 213

ASCII value of is 214

ASCII value of is 215

ASCII value of is 216

ASCII value of is 217

ASCII value of is 218

ASCII value of is 219

ASCII value of is 220

ASCII value of is 221

ASCII value of is 222

ASCII value of is 223

ASCII value of α is 224

ASCII value of ß is 225

ASCII value of Γ is 226

ASCII value of π is 227

ASCII value of Σ is 228

ASCII value of σ is 229

ASCII value of µ is 230

ASCII value of τ is 231

ASCII value of Φ is 232

ASCII value of Θ is 233

ASCII value of Ω is 234

ASCII value of δ is 235

ASCII value of is 236

ASCII value of φ is 237

ASCII value of ε is 238

ASCII value of is 239

ASCII value of is 240

ASCII value of ± is 241

ASCII value of is 242

ASCII value of is 243

ASCII value of is 244

ASCII value of is 245

ASCII value of ÷ is 246

ASCII value of is 247

ASCII value of ° is 248

ASCII value of is 249

ASCII value of · is 250

ASCII value of is 251

ASCII value of is 252

ASCII value of ² is 253

ASCII value of is 254

ASCII value of   is 255

For list of all c programming interviews / viva question and answers visit: C Programming Interview / Viva Q&A List

For full C programming language free video tutorial list visit:C Programming: Beginner To Advance To Expert

C Program To Find Special Symbol or Not using Conditional Operator

Using Conditional / Ternary Operator determine, whether a character entered through the keyboard is a Special Symbol or not.

Note: ASCII values start from 0 to 255. So we have total of 266 ASCII values.

ASCII Code for Special Symbols
0 – 47
58 – 64
91 – 96
123 – 255

Also Check:
C Program To Find Lowercase Alphabet or Not using Conditional Operator

Related Read:
Relational Operators In C
Logical Operators In C
Ternary Operator / Conditional Operator In C
C Program To Print All ASCII Characters and Code

Ternary / Conditional Operator General Form

(expression_1) ? (expression_2) : (expression_3);

expression_1 is a comparison/conditional argument. expression_2 is executed/returned if expression_1 results in true, expression_3 gets executed/returned if expression_1 is false.

Ternary operator / Conditional Operator can be assumed to be shortened way of writing an if-else statement.

Expected Output for the Input

User Input:
Enter a Character
$

Output:
Character Entered Is a Special Symbol

Logic To Find Special Symbol or Not using Conditional Operator

Using Conditional Operator we write the condition, if user entered character is in between or equal to ASCII values 0 – 47 or 58 to 64 or 91 to 96 or greater than or equal to 123. We use Relational Operator and Logical Operators to accomplish the task.

If the condition in expression_1 is true, then whatever code is present in expression_2 gets executed. If condition is expression_1 is false then the code present in expression_3 gets executed.

Video Tutorial: C Program To Find Character is Special Symbol or Not using Conditional Operator


[youtube https://www.youtube.com/watch?v=LDxdmrCRqCU]

YouTube Link: https://www.youtube.com/watch?v=LDxdmrCRqCU [Watch the Video In Full Screen.]

Source Code: C Program To Find Special Symbol or Not using Conditional Operator

#include<stdio.h>

int main()
{
    char ch;

    printf("Enter a Character\n");
    scanf("%c", &ch);

    ( (ch >= 0  && ch <= 47) ||
      (ch >= 58 && ch <= 64) ||
      (ch >= 91 && ch <= 96) ||
      (ch >= 123) ) ?
      printf("Character Entered Is a Special Symbol\n") :
      printf("Character Entered Is not a Special Symbol\n");

    return 0;
}

Output 1:
Enter a Character
#
Character Entered Is a Special Symbol

Output 2:
Enter a Character
a
Character Entered Is not a Special Symbol

Output 3:
Enter a Character
Z
Character Entered Is not a Special Symbol

Output 4:
Enter a Character
5
Character Entered Is not a Special Symbol

Output 5:
Enter a Character
$
Character Entered Is a Special Symbol

For list of all c programming interviews / viva question and answers visit: C Programming Interview / Viva Q&A List

For full C programming language free video tutorial list visit:C Programming: Beginner To Advance To Expert

C Program To Find Lowercase Alphabet or Not using Conditional Operator

Using Conditional Operator / Ternary Operator determine, whether the character entered through the keyboard is a lower case English alphabet or not.

Also Check:
C Program To Find Special Symbol or Not using Conditional Operator

Related Read:
Relational Operators In C
Logical Operators In C
Ternary Operator / Conditional Operator In C
C Program To Print All ASCII Characters and Code

Expected Output for the Input

User Input:
Enter a character
a

Output:
Character entered is a lowercase English alphabet

Logic To Find Lowercase Alphabet or Not using Conditional Operator

Using Conditional Operator we write the condition, if user entered character is greater than or equal to ASCII Value 97(which corresponds to lowercase character a) and less than or equal to ASCII Value 122(which corresponds to lowercase character z).

If the condition is true, then user entered character is lower case English alphabet, if not, then its not a lowercase English alphabet.

Video Tutorial: C Program To Find Lowercase Alphabet or Not using Conditional Operator


[youtube https://www.youtube.com/watch?v=YM50IowuYhk]

YouTube Link: https://www.youtube.com/watch?v=YM50IowuYhk [Watch the Video In Full Screen.]

Source Code: C Program To Find Lowercase Alphabet or Not using Conditional Operator

#include < stdio.h >

int main()
{
    char ch;

    printf("Enter a character\n");
    scanf("%c", &ch);

    (ch >= 97 && ch <= 122) ?
    printf("Character entered is a lowercase English alphabet\n") :
    printf("Character entered is not a lowercase English alphabet\n");

    return 0;
}

Output 1:
Enter a character
$
Character entered is not a lowercase English alphabet

Output 2:
Enter a character
A
Character entered is not a lowercase English alphabet

Output 3:
Enter a character
5
Character entered is not a lowercase English alphabet

Output 4:
Enter a character
a
Character entered is a lowercase English alphabet

Output 5:
Enter a character
z
Character entered is a lowercase English alphabet

ASCII Values of Lowercase English Alphabets

ASCII value of a is 97

ASCII value of b is 98

ASCII value of c is 99

ASCII value of d is 100

ASCII value of e is 101

ASCII value of f is 102

ASCII value of g is 103

ASCII value of h is 104

ASCII value of i is 105

ASCII value of j is 106

ASCII value of k is 107

ASCII value of l is 108

ASCII value of m is 109

ASCII value of n is 110

ASCII value of o is 111

ASCII value of p is 112

ASCII value of q is 113

ASCII value of r is 114

ASCII value of s is 115

ASCII value of t is 116

ASCII value of u is 117

ASCII value of v is 118

ASCII value of w is 119

ASCII value of x is 120

ASCII value of y is 121

ASCII value of z is 122

For list of all c programming interviews / viva question and answers visit: C Programming Interview / Viva Q&A List

For full C programming language free video tutorial list visit:C Programming: Beginner To Advance To Expert

C Program To Check For Alphabet, Number and Special Symbol

Any character is entered through the keyboard, write a C program to determine whether the character entered is a capital letter, a small case letter, a digit or a special symbol.

The following table shows the range of ASCII values for various characters:
Character A – Z : ASCII Value 65 – 90
Character a – z : ASCII Value 97 – 122
Character 0 – 9 : ASCII Value 48 – 57
Special Symbol : ASCII Value 0 – 47, 58 – 64, 91 – 96, 123 – 127

ascii codes

Related Read:
else if statement in C
Relational Operators In C
C Program To Print All ASCII Characters and Code

Expected Output for the Input

User Input:
Enter a Character
$

Output:
$ is a Special Character

Video Tutorial: C Program To Check For Alphabet, Number or Special Symbol


[youtube https://www.youtube.com/watch?v=NBcG-r0P9P8]

YouTube Link: https://www.youtube.com/watch?v=NBcG-r0P9P8 [Watch the Video In Full Screen.]

Source Code: C Program To Check For Alphabet, Number and Special Symbol

#include<stdio.h>

int main()
{
    char ch;

    printf("Enter a Character\n");
    scanf("%c", &ch);

    if(ch >= 65 && ch <= 90)
    {
        printf("%c is an Uppercase Alphabet\n", ch);
    }
    else if(ch >= 97 && ch <= 122)
    {
        printf("%c is an lowercase Alphabet\n", ch);
    }
    else if(ch >= 48 && ch <= 57)
    {
        printf("%c is a Number\n", ch);
    }
    else if( (ch >= 0  && ch <= 47) ||
             (ch >= 58 && ch <= 64) ||
             (ch >= 91 && ch <= 96) ||
             (ch >= 123 && ch <= 127))
    {
        printf("%c is a Special Character\n", ch);
    }

    return 0;
}

Output 1:
Enter a Character
A
A is an Uppercase Alphabet

Output 2:
Enter a Character
i
i is an lowercase Alphabet

Output 3:
Enter a Character
8
8 is a Number

Output 4:
Enter a Character
$
$ is a Special Character

Logic To Check For Alphabet, Number and Special Symbol

We use &&(AND) operator check check for range. i.e., for number, we check from the range 48 to 57. To check if the user entered character lies in this range we use (ch >= 48 && ch <= 57). To check for multiple ranges we use ||(OR) operator. For example, for special symbol:


(ch >= 0 && ch <= 47) ||
(ch >= 58 && ch <= 64) ||
(ch >= 91 && ch <= 96) ||
(ch >= 123 && ch <= 127)

For list of all c programming interviews / viva question and answers visit: C Programming Interview / Viva Q&A List

For full C programming language free video tutorial list visit:C Programming: Beginner To Advance To Expert