C program to print the sum of all elements in an array

12. C program to print the sum of all elements in an array

In this program, we need to calculate the sum of all the elements of an array. This can be solved by looping through the array and add the value of the element in each iteration to variable sum.

Sum of all elements of an array is 1 + 2 + 3 + 4 + 5 = 15.

ALGORITHM:

STEP 1: START
STEP 2: INITIALIZE arr[] = {1, 2, 3, 4, 5}
STEP 3: SET sum = 0
STEP 4: length= sizeof(arr)/sizeof(arr[0])
STEP 5: SET i=0. REPEAT STEP 6 and STEP 7 UNTIL i<length
STEP 6: sum = sum + arr[i]
STEP 7: i=i+1.
STEP 8: PRINT "Sum of all the elements of an array:" by assigning sum.
STEP 9: RETURN 0.
STEP 10: END.

PROGRAM:

#include <stdio.h>  
int main()  
{  
    //Initialize array   
    int arr[] = {1, 2, 3, 4, 5};   
    int sum = 0;  
      
    //Calculate length of array arr  
    int length = sizeof(arr)/sizeof(arr[0]);  
      
    //Loop through the array to calculate sum of elements  
    for (int i = 0; i < length; i++) {   
       sum = sum + arr[i];  
    }    
    printf("Sum of all the elements of an array: %d", sum);  
    return 0;  
}  

Output: