C Exercises: Return the absolute value of an integer

Last update on July 29 2025 12:55:09 (UTC/GMT +8 hours)

16. Absolute Value of an Integer

Write a C program to return the absolute value of an integer.

Sample Solution:

C Code:

#include<stdio.h>      // Include the standard input/output header file.
#include<stdlib.h>     // Include the standard library header file.

int main ()          // Start of the main function.
{
int num;          // Declare an integer variable 'num'.

printf("\n Input a positive or negative number :");   // Prompt the user to input a number.
scanf("%d",&num);   // Read the user's input and store it in 'num'.

printf (" The absolute value of the given number is : %d\n\n",abs(num));   // Calculate and print the absolute value of 'num'.

return 0;   // Return 0 to indicate successful execution of the program.
}   // End of the main function.

Sample Output:

 Input a positive or negative number :-25                                                                     
 The absolute value of the given number is : 25

Flowchart:

For more Practice: Solve these Related Problems:

Write a C program to implement an inline function that returns the absolute value of an integer.
Write a C program to compute the absolute value of an integer using bitwise operations instead of library functions.
Write a C program to determine the absolute value of an integer without calling any standard library function.
Write a C program to create a macro that calculates the absolute value of a given integer and test it with various inputs.

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