C Program To Find Absolute Value of a Number

Write a C program to find absolute value of a number entered through the keyboard.

Absolute Value
In mathematics, the absolute value or modulus |x| of a real number x is the non-negative value of x without regard to its sign. The absolute value of a number may be thought of as its distance from zero.

Note: abs() is a builtin method/function present in library/header file stdlib.h

Example For Absolute Value of a Number

1. If user enters/inputs a value of 5. Then the distance from 0 to 5 is 5 units. So the absolute value of 5 is 5. Mathematically its written as |5| = 5. Its read as Modulus 5 is 5.

2. If user enters/inputs a value of -5. Then the distance from 0 to -5 is 5 units. So the absolute value of -5 is 5. Mathematically its written as |-5| = 5. Its read as Modulus -5 is 5.

Expected Output for the Input

User Input:
Enter a positive or negative number
-14

Output:
Absolute Value of -14 is 14

Video Tutorial: C Program To Find Absolute Value of a Number

Source Code: C Program To Find Absolute Value of a Number

#include<stdio.h>
#include<stdlib.h>

int main()
{
    int num;

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

    printf("Absolute Value of |%d| is %d\n", num, abs(num));

    return 0;
}

Output 1:
Enter a positive or negative number
14
Absolute Value of |14| is 14

Output 2:
Enter a positive or negative number
41
Absolute Value of |41| is 41

Output 3:
Enter a positive or negative number
-2
Absolute Value of |-2| is 2

Output 4:
Enter a positive or negative number
2
Absolute Value of |2| is 2

Output 5:
Enter a positive or negative number
-100
Absolute Value of |-100| is 100

Note: abs() works only for integer values and not for floating or double type data.

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