C Program to Find Sum of All Array Elements

Here is the C program to find sum of array elements using for loop.

Required Knowledge

Algorithm to find sum of all array elements
Let inputArray is an integer array having N elements.

Declare an integer variable 'sum' and initialize it to 0. We will use 'sum' variable to store sum of elements of array.

Using for loop, we will traverse inputArray from array from index 0 to N-1.

For any index i (0<= i <= N-1), add the value of element at index i to sum.
sum = sum + inputArray[i];

After termination of for loop, sum will contain the sum of all array elements.

C program to find the sum of all array elements using for loop

#include <stdio.h>
 
int main(){
    int inputArray[500], elementCount, counter, sum = 0;
     
    printf("Enter Number of Elements in Array\n");
    scanf("%d", &elementCount);
    printf("Enter %d numbers \n", elementCount);
    
    /* Read array elements */
    for(counter = 0; counter < elementCount; counter++){
        scanf("%d", &inputArray[counter]);
    }
       
    /* Add array elements */
    for(counter = 0; counter < elementCount; counter++){
        sum += inputArray[counter];
    }
    
    printf("Sum of All Array Elements : %d", sum);
         
    return 0;
}

Output

Enter Number of Elements in Array
5
Enter 5 numbers
1
2
3
4
5
Sum of All Array Elements : 15

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