C programming - Part 25

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.

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 ⁿ 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 Print Floyd’s Triangle using For Loop

Lets write C program to print Floyd’s Triangle, using nested for loop.

Floyd’s Triangle: is a right angled Triangle formed with natural numbers.

Video Tutorial: C Program To Print Floyd’s Triangle using For Loop

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

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

Logic To Print Floyd’s Triangle using For Loop

We ask the user to input the number of rows for Floyd’s Triangle, we store it inside variable num.

Outer For loop
In our C program, row number and the total numbers to be printed for that row is present inside variable row. So the outer for loop selects the row number and the number of elements to be printed in that row.

We initialize the row to 1 and iterate through the outer for loop until row is less than or equal to user entered number. For each iteration of the outer for loop we increment the value of row by 1. That way selecting the next row for each iteration.

Inner For loop
Inner for loop prints natural numbers in each selected row. Variable col is assigned to 1 for each iteration of outer for loop, so that the numbers gets printed from the first position in any selected row.

Inner for loop prints the natural number from the first position till the selected row number of times.

For Example, if user enters num = 5, the following Triangle will be printed:

1
2 3
4 5 6
7 8 9 10
11 12 13 14 15

Note that the Triangle printed is a right angled Triangle and has 5 rows of natural numbers.

Important Note:
Also note that first row has 1 number. Second row has 2 numbers. Third row has 3 numbers and so on. So row number and total numbers in that particular row are always equal in any Floyd’s Triangle.

Source Code: C Program To Print Floyd’s Triangle using For Loop

#include<stdio.h>

int main()
{
    int num, row, col, count = 1;

    printf("Enter number of rows for Floyd's Triangle\n");
    scanf("%d", &num);

    printf("\n");
    for(row = 1; row <= num; row++)
    {
        for(col = 1; col <= row; col++)
        {
            printf("%d  ", count++);
        }
        printf("\n");
    }

    return 0;
}

Output 1:
Enter number of rows for Floyd’s Triangle
5

1
2 3
4 5 6
7 8 9 10
11 12 13 14 15

Output 2:
Enter number of rows for Floyd’s Triangle
14

1
2 3
4 5 6
7 8 9 10
11 12 13 14 15
16 17 18 19 20 21
22 23 24 25 26 27 28
29 30 31 32 33 34 35 36
37 38 39 40 41 42 43 44 45
46 47 48 49 50 51 52 53 54 55
56 57 58 59 60 61 62 63 64 65 66
67 68 69 70 71 72 73 74 75 76 77 78
79 80 81 82 83 84 85 86 87 88 89 90 91
92 93 94 95 96 97 98 99 100 101 102 103 104 105

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 Perfect Number using For loop

Lets write a C program to check if user entered number is a perfect number or not, using for loop.

Perfect Number: A number is called perfect number if sum of its divisors(except the number itself) is equal to the number.

For Example: If the user entered number is 28. The numbers which perfectly divide 28 are 1, 2, 4, 7, 14, 28. Leave 28 and add all other numbers. i.e., 1 + 2 + 4 + 7 + 14 = 28. So the entered number and the sum are equal. So 28 is a perfect number.

Video Tutorial: C Program To Check Perfect Number or Not, using For loop

[youtube https://www.youtube.com/watch?v=i1bAVHYOOyU]

YouTube Link: https://www.youtube.com/watch?v=i1bAVHYOOyU [Watch the Video In Full Screen.]

Source Code: C Program To Find Perfect Number using For loop

#include<stdio.h>

int main()
{
    int num, count, sum = 0;

    printf("Enter a number\n");
    scanf("%d", &num);

    printf("Factors of %d are(except the number itself):\n", num);
    for(count = 1; count < num; count++)
    {
        if(num % count == 0)
        {
            printf("%d\n", count);
            sum = sum + count;
        }
    }

    if(sum == num)
        printf("\n%d is a perfect number\n", num);
    else
        printf("\n%d is not a perfect number\n", num);

    return 0;
}

Output 1
Enter a number
6
Factors of 6 are(except the number itself):
1
2
3

6 is a perfect number

Output 2
Enter a number
8
Factors of 8 are(except the number itself):
1
2
4

8 is not a perfect number

Output 3
Enter a number
14
Factors of 14 are(except the number itself):
1
2
7

14 is not a perfect number

Output 4
Enter a number
28
Factors of 28 are(except the number itself):
1
2
4
7
14

28 is a perfect number

Logic To Check Perfect Number or Not using For loop

We ask the user to enter a number and store it inside address of integer variable num. Next we find factors of that user entered number i.e., all the numbers which perfectly divide the user entered number. In that factors list, we exclude the user entered number itself.

Now we add all the factors(except the user entered number itself). If the sum and the user entered number are equal then its a perfect number.

We initialize for loop counter variable count to 1 and iterate the for loop until count is less than num. For each iteration of for loop we increment the value of count by 1.

Inside for loop we check if num % count == 0. If true, we add value of count to previous value of variable sum.

After control exits for loop we check if the value of sum and number entered by the user are same. If its same, then the user entered number is perfect number. If not, the number is not a perfect number.

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 Factors of a Number using For Loop

Write a C program to display Factors of user entered number, using for loop. All the numbers which perfectly divide a given number are called as Factors of that number.

For Example, if user enters integer number 50. All the numbers which perfectly divide the number 50 are called Factors of number 50.

Video Tutorial: C Program to Find Factors of a Number using For Loop

[youtube https://www.youtube.com/watch?v=sKcL5I3kOIo]

YouTube Link: https://www.youtube.com/watch?v=sKcL5I3kOIo [Watch the Video In Full Screen.]

Logic To Find Factors of a Number using For Loop

We ask the user to enter a integer number. Next we iterate through the for loop until count is less than or equal to the user entered number. Example, if user entered number is 50, then we iterate through the loop for 50 times. Each time we check if the user entered number is perfectly divisible by the value of count. Initial value of count is 1 and after each iteration of the loop count value increments by 1. Whenever a number perfectly divides the user entered number, we display it as factor of the user entered number.

Source Code: C Program to Find Factors of a Number using For Loop

#include<stdio.h>

int main()
{
    int num, count;

    printf("Enter a number to find factors\n");
    scanf("%d", &num);

    printf("Factors of %d are\n", num);
    for(count = 1; count <= num; count++)
    {
        if(num % count == 0)
            printf("%d\n", count);
    }

    return 0;
}

Output 1:
Enter a number to find factors
60
Factors of 60 are
1
2
3
4
5
6
10
12
15
20
30
60

Output 2:
Enter a number to find factors
25
Factors of 25 are
1
5
25

Output 3:
Enter a number to find factors
40
Factors of 40 are
1
2
4
5
8
10
20
40

Output 4:
Enter a number to find factors
75
Factors of 75 are
1
3
5
15
25
75

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 First and Second Biggest in N Numbers, without using Arrays, using For Loop

Write a C program to find first and second biggest numbers in a list of N numbers entered by the user, without using arrays and without sorting the list and by using for loop.

Video Tutorial: C Program To Find First and Second Biggest in N Numbers, without using Arrays, using For Loop

[youtube https://www.youtube.com/watch?v=EtdVsh9XhS8]

YouTube Link: https://www.youtube.com/watch?v=EtdVsh9XhS8 [Watch the Video In Full Screen.]

Source Code: C Program To Find First and Second Biggest in N Numbers, without using Arrays, using For Loop

#include<stdio.h>

int main()
{
    int limit, num, count, fbig = 0, sbig = 0;

    printf("Enter the limit\n");
    scanf("%d", &limit);

    printf("Enter %d positive numbers\n", limit);

    for(count = 1; count <= limit; count++)
    {
        scanf("%d", &num);

        if(num > fbig)
        {
            sbig = fbig;
            fbig = num;
        }

        if(num > sbig && num < fbig)
        {
            sbig = num;
        }
    }

    printf("First big = %d\nSecond Big = %d\n", fbig, sbig);

    return 0;
}

Output 1:
Enter the limit
5
Enter 5 positive numbers
1
9
5
3
8
First big = 9
Second Big = 8

Output 2:
Enter the limit
8
Enter 8 positive numbers
1
5
9
3
7
8
6
10
First big = 10
Second Big = 9

Logic To Find First and Second Biggest Number in N Numbers, without using Arrays

First we ask the user to enter length of numbers list. If user enters limit value as 5, then we ask the user to enter 5 numbers. Once the user enters limit value, we iterate the for loop until loop counter variable count is less than or equal to limit. For each iteration of for loop we ask the user to enter a positive integer number. We check if the new number entered by the user is greater than fbig. If true, we swap the value of fbig to sbig and value of num to fbig.

Next we check if the user entered number is greater than sbig and less than fbig, if true, we assign the value of num to sbig.

Once control exits for loop, inside fbig we will have biggest number from the list of numbers entered by the user and sbig will have the second biggest number from the list of numbers entered by the user.

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