C Programming: Check whether a character is digit or not

Last update on December 20 2024 13:21:39 (UTC/GMT +8 hours)

Write a program in C to check whether a character is a digit or not.

Sample Solution:

C Code:

#include<stdio.h>
#include<ctype.h>

int main() {
    char TestChar; // Variable to store the input character

    // Display a message to prompt the user to input a character
    printf("\n Check whether a character is digit or not :\n");
    printf("----------------------------------------------\n");
    printf(" Input a character : ");

    scanf("%c", &TestChar); // Read a character from user input

    // Check if the input character is a digit using isdigit() function
    if (isdigit(TestChar)) {
        printf(" The entered character is a digit. \n\n"); // Display message if it's a digit
    } else {
        printf(" The entered character is not a digit. \n\n"); // Display message if it's not a digit
    }

    return 0; // Return 0 to indicate successful execution of the program
}

Sample Output:

 Check whether a character is digit or not :
----------------------------------------------
 Input a character : 8
 The entered character is a digit.

Flowchart :

C Programming Code Editor:

Click to Open Editor

Have another way to solve this solution? Contribute your code (and comments) through Disqus.

Previous: Write a program in C to read a file and remove the spaces between two words of its content.
Next: Write a program in C to split string by space into words.