# C Program to Find Sum of All Array Elements

• Write a C program to find sum of array elements using for loop.
• How to find sum of all elements of an array.

#### 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 storeĀ 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 theĀ sum of all array elements.

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

/*
* C Program to find sum of all array elements
*/
#include <stdio.h>
#include <conio.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);

for(counter = 0; counter < elementCount; counter++){
scanf("%d", &inputArray[counter]);
}

for(counter = 0; counter < elementCount; counter++){
sum += inputArray[counter];
}

printf("Sum of All Array Elements : %d", sum);

getch();
return 0;
}

Output

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