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C Exercises: Return the absolute value of a long integer

C Variable Type : Exercise-8 with Solution

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

Sample Solution:

C Code:

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

	int main ()
	{
		long int x,y;
	      printf("\n Input 1st number (positive or negative) : ");
	      scanf("%ld",&x);	
	      printf(" Input 2nd number (positive or negative) : ");
	      scanf("%ld",&y);		
		printf (" The absolute value of 1st number is : %ld\n",labs(x));
		printf (" The absolute value of 2nd number is : %ld\n\n",labs(y));

		return 0;
		}
	

Sample Output:

Input 1st number (positive or negative) : 25                                                                 
Input 2nd number (positive or negative) : -125                                                               
The absolute value of 1st number is : 25                                                                     
The absolute value of 2nd number is : 125 

Flowchart:

C Exercises Flowchart: Return the absolute value of a long integer

C Programming Code Editor:

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C Programming: Tips of the Day

How I can print to stderr in C?

The syntax is almost the same as printf. With printf you give the string format and its contents i.e.:

printf("my %s has %d chars\n", "string format", 30);

With fprintf it is the same, except now you are also specifying the place to print to:

File *myFile;
...
fprintf( myFile, "my %s has %d chars\n", "string format", 30);

Or in your case:

fprintf( stderr, "my %s has %d chars\n", "string format", 30);

Ref : https://bit.ly/3v5U8Zq