Question

How to find the length (size) of an int array in C

Answer 1

#include <stdio.h> 
 
int main(void)
{   
    int arr[] = {4, 2, 7, 1, 9, 2, 8};
    
    int size = sizeof(arr) / sizeof(arr[0]);

    printf("size = %d\n", size);
     
    return 0;
}
 
         
/*
run:
      
size = 7
 
*/

 

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Answer 2

#include <stdio.h> 
  
int main(void)
{   
    int arr[] = {4, 2, 7, 1, 9, 2, 8};
     
    int size = sizeof(arr) / sizeof(*arr);
 
    printf("size = %d\n", size);
      
    return 0;
}
  
          
/*
run:
       
size = 7
  
*/

 

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