Absolute value in C without using the predefined function

Learn about Absolute value in C without using the predefined function in the below code example. Also refer the comments in the code snippet to get a detailed view about what’s actually happening.

Contents

Absolute value in C without using the predefined function

The if block statement is used in this C code. If the number is negative, convert it to a positive number; else, it will remain as is. The minus operator (-) can be used to transform a negative number to a positive number. Finally, the printf function is used to display the output on the screen.

Program:

#include<stdio.h>
int main()
{
  double n;

  printf("Enter a number: ");
  scanf("%f",&n);

  if(n<0.0) n = -n ;

  printf("Absolute value = %f\n", n);

  return 0;
}

Output:

Enter a number: 3
Absolute value = 3

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