C Program to Check Character is Lowercase or Not

In this tutorial you will learn about the C Program to Check Character is Lowercase or Not and its application with practical example.

In this tutorial, we will learn to create a C program that will Check the Character in Lowercase or Not in C programming.

Table Of Contents−

Prerequisites

Before starting with this tutorial, we assume that you are the best aware of the following C programming topics:

Operators in C Programming.
Basic Input and Output function in C Programming.
Basic C programming.

Conditional Statements in C programming.

What is a character?

The character is a single alphabetical entity in the English language and in any word. These letters can be both capital & small or uppercase & lowercase.

For Example:-

In the “World” word the there are five characters, they are as follows

“W”
“o”

“r”
“l”
‘d’

Here,

“W” is an uppercase letter.

“o” is a lowercase letter.

“r” is a lowercase letter.

“l” is a lowercase letter.

“d” is a lowercase letter.

Algorithm:-

1. Declaring the variables for the program.

2. Taking the input character from the user.

3. Passing those variables to conditional statements.

4. Using those conditions to find the case of letter is "uppercase" or "lowercase".

5. Printing the result.

6. End Program.

1. Declaring the variables for the program.

2. Taking the input character from the user.

3. Passing those variables to conditional statements.

4. Using those conditions to find the case of letter is "uppercase" or "lowercase".

5. Printing the result.

6. End Program.

Program to Check the Character is Lowercase or Uppercase Alphabet

First, will take the character in input from the user. Then will pass that character in the conditional statements to find whether it is lowercase or not.

With the help of this program, we can Check the Character is in lowercase or not.

Program Code:-

/**
 * C program to check whether a character is Lowercase or not 
 */

#include <stdio.h>

int main()
{
    /* declaring the variable required for the program. */
    char chr;

    /* Input character from user FOR THE PROGRAM*/
    printf("Enter any character: ");
    scanf("%c", &chr);

    /* CHECKING THE INPUT FROM THE USER CHARACTER IF ITS LOWER CASE  OR NOT  */
    if(chr >= 'A' && chr <= 'Z')
    {
        //printing the output of the program as not in lower case.
        printf("'%c' is not in lower case alphabet.", chr);
    }
    else if(chr >= 'a' && chr <= 'z')
    {
        //printing the output of the program as lower case.
        printf("'%c' is a lower case alphabet.", chr);
    }
    else
    {
        //printing the output of the program as not a character.
        printf("'%c' is not an alphabet.", chr);
    }

    return 0;
}

/**

* C program to check whether a character is Lowercase or not

#include <stdio.h>

int main()

{

/* declaring the variable required for the program. */

char chr;

/* Input character from user FOR THE PROGRAM*/

printf("Enter any character: ");

scanf("%c", &chr);

/* CHECKING THE INPUT FROM THE USER CHARACTER IF ITS LOWER CASE OR NOT */

if(chr >= 'A' && chr <= 'Z')

{

//printing the output of the program as not in lower case.

printf("'%c' is not in lower case alphabet.", chr);

}

else if(chr >= 'a' && chr <= 'z')

{

//printing the output of the program as lower case.

printf("'%c' is a lower case alphabet.", chr);

}

else

{

//printing the output of the program as not a character.

printf("'%c' is not an alphabet.", chr);

}

return 0;

}

Output:-

In the above program, we have first initialized the required variable.

chr = it will hold the character value for the input.

Input character from the user.

Finding the character is in lower case or not.

Printing output for the program.

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C Program to Check Character is Lowercase or Not