call by value in c - Wikitechy https://www.wikitechy.com/interview-questions/tag/call-by-value-in-c/ Interview Questions Tue, 14 Sep 2021 05:58:33 +0000 en-US hourly 1 https://wordpress.org/?v=6.9.4 https://www.wikitechy.com/interview-questions/wp-content/uploads/2025/10/cropped-wikitechy-icon-32x32.png call by value in c - Wikitechy https://www.wikitechy.com/interview-questions/tag/call-by-value-in-c/ 32 32 Explain Call by Value in C language ? https://www.wikitechy.com/interview-questions/c/explain-call-by-value-in-c-language/ https://www.wikitechy.com/interview-questions/c/explain-call-by-value-in-c-language/#respond Mon, 12 Jul 2021 20:43:35 +0000 https://www.wikitechy.com/interview-questions/?p=332 Explain Call by Value in C language ?

Call by value

  • In call by value, original value is not modified.
  • In call by value, value being passed to the function is locally stored by the function parameter in stack memory location. If you change the value of function parameter, it is changed for the current function only.
  • It will not change the value of variable inside the caller method such as main().

Sample Code

#include<stdio.h>
void change(int num) 
{    
    printf("Before adding value inside function num=%d \n",num);    
    num=num+100;    
    printf("After adding value inside function num=%d \n", num);    
}    
int main() 
{    
    int x=100;    
    printf("Before function call x=%d \n", x);    
    change(x);//passing value in function    
    printf("After function call x=%d \n", x);    
    return 0;  
}

Output

Before function call x=100 
Before adding value inside function num=100
After adding value inside function num=200
After function call x=100
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