# Program to calculate sum of array in C

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This program should give an insight of how to parse (read) array. We shall use a loop and sum up all values of the array.

## Algorithm

Let's first see what should be the step-by-step procedure of this program −

```START
Step 1 → Take an array A and define its values
Step 2 → Loop for each value of A
Step 3 → Add each element to 'sum' variable
Step 4 → After the loop finishes, display 'sum'
STOP
```

## Pseudocode

Let's now see the pseudocode of this algorithm −

```procedure sum_array(A)

Declare sum as integer
FOR EACH value in A DO
sum ← sum + A[n]
END FOR
Display sum

end procedure
```

## Implementation

This pseudocode can now be implemented in the C program as follows −

```#include <stdio.h>

int main() {
int array[10] = {1, 2, 3, 4, 5, 6, 7, 8, 9, 0};
int sum, loop;

sum = 0;

for(loop = 9; loop >= 0; loop--) {
sum = sum + array[loop];
}

printf("Sum of array is %d.", sum);

return 0;
}
```

The output should look like this −

```Sum of array is 45.
```
array_examples_in_c.htm