lowercase

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

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

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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

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)

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C Program To Print Lowercase Alphabet(a-z) using While loop

In this video tutorial we show you how to write C program to print all the lower case alphabets(a-z) using simple while loop.

Note: In C programming language, every character variable holds an ASCII value rather than the character itself. You can check ASCII value of all the characters here: C Program To Print All ASCII Characters and Code

Note:
ASCII value range of lower case alphabets:
ASCII value of a is 97.
ASCII value of b is 98.
ASCII value of c is 99.
and so on till z ..
ASCII value of z is 122.

Source Code: C Program To Print Lowercase Alphabet(a-z) using While loop

#include < stdio.h >

int main()
{
    char ch = 'a';

    printf("Lowercase English Alphabets:\n");
    while(ch <= 'z')
    {
        printf("%c ", ch);
        ch++;
    }
    printf("\n");

    return 0;
}

Output:
Lowercase English Alphabets:
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

Logic To Print Lowercase Alphabet(a-z) using While loop

Each alphabet has it’s own(unique) ASCII value. We initialize the character variable ch to a. Alphabet a has a ASCII value of 97. 97 gets stored in ch. We iterate through the while loop until value of ch is less than or equal to z(i.e., upto ASCII value of z, which is 122). We print character value(%c) of the variable ch, which has the character and not the ASCII value. We keep incrementing the value of ch by 1 for each iteration of while loop.

Video Tutorial: C Program To Print Lowercase Alphabet(a-z) using While loop

[youtube https://www.youtube.com/watch?v=Gzj1M80Uug0]

YouTube Link: https://www.youtube.com/watch?v=Gzj1M80Uug0 [Watch the Video In Full Screen.]

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