﻿ C Program: Sum of all elements in an array - w3resource

# C Exercises: Sum of all elements in an array

## C Pointer : Exercise-16 with Solution

Write a program in C to compute the sum of all elements in an array using pointers.

Visual Presentation:

Sample Solution:

C Code:

``````#include <stdio.h>

int main() {
// Declaring variables
int arr1[10];
int i, n, sum = 0;
int *pt;

// Displaying the purpose of the program
printf("\n\n Pointer : Sum of all elements in an array :\n");
printf("------------------------------------------------\n");

// Inputting the number of elements for the array (maximum 10)
printf(" Input the number of elements to store in the array (max 10) : ");
scanf("%d", &n);

// Inputting elements into the array
printf(" Input %d number of elements in the array : \n", n);
for (i = 0; i < n; i++) {
printf(" element - %d : ", i + 1);
scanf("%d", &arr1[i]);
}

pt = arr1; // pt stores the base address of array arr1

// Calculating the sum of array elements using pointer
for (i = 0; i < n; i++) {
sum = sum + *pt; // Adding the value pointed by pt to the sum
pt++; // Moving the pointer to the next element of the array
}

// Displaying the sum of the array elements
printf(" The sum of array is : %d\n\n", sum);
}
```
```

Sample Output:

``` Pointer : Sum of all elements in an array :
------------------------------------------------
Input the number of elements to store in the array (max 10) : 5
Input 5 number of elements in the array :
element - 1 : 2
element - 2 : 3
element - 3 : 4
element - 4 : 5
element - 5 : 6
The sum of array is : 20
```

Flowchart:

C Programming Code Editor:

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