Example 2 : Function returning integer data type

Program : Function returning integer value.

#include<stdio.h>
int add(int,int);
int main()
 {
 int n1=10,n2=20,sum;
 sum = add(n1,n2);
 printf("\nAddition is : %d",sum);
 return(0);
 }
int add(int n1,int n2)
{
  return(n1+n2);
}

Explanation :

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Prototype Declaration :

int add(int,int);

Integer Data Type -
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• Check return type in prototype declaration.
• We have written type as integer.
• So we need to assign function call to any integer variable.

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sum = add(n1,n2);

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• sum is integer variable .
• add(n1,n2) will return integer value.
• Result of the function is accessible inside the add() function only , but we want to use that result inside main.
• So we are using assignment statement to store value returned by function.

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