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Write C program to find sum of array elements using recursion

YasminRadwan26
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2022-05-07
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Write C program to find sum of array elements using recursion

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YasminRadwan26
2022-05-07
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I have used Code::blocks 12 compiler for debugging purpose. But you can use any C programming language compiler as per your availability.

#include <stdio.h>
#define MAX_SIZE 100
 
// Function declaration
int sum(int arr[], int start, int len);
 
 
int main()
{
    int arr[MAX_SIZE];
    int num, i, sumofarray;
 
 
    // Inputtin size and elements in array
    printf("Enter size of the array: ");
    scanf("%d", &num);
    printf("Enter elements in the array: ");
    for(i=0; i<num; i++)
    {
        scanf("%d", &arr[i]);
    }
 
 
    sumofarray = sum(arr, 0, num);
    printf("Sum of array elements: %d", sumofarray);
 
    return 0;
}
 
// Recursively finding the sum of elements in an array.
int sum(int arr[], int start, int len)
{
    // Recursion base condition
    if(start >= len)
        return 0;
 
    return (arr[start] + sum(arr, start + 1, len));
}

Result:

Enter size of the array: 5 

Enter elements in the array: 10

20

30

40

50

Sum of array elements: 150

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