write a c program to calculate the summation of a series of numbers using function | Functions in C | C programing examples 

C program that calculates the summation of a series of numbers using a function. 

Here mathematical series of the form:

S = 1 + 2 + 3 + ......... + n

Where n is given by the user, and the function computes the sum.

C Program to Calculate Summation of a Series (1 + 2 + ... + n): 

#include <stdio.h>

// Function to calculate the summation of a series from 1 to n

int calculateSummation(int n) 

{

    int sum = 0;

    for(int i = 1; i <= n; i++) 

    {

        sum += i;

    }

    return sum;

}

int main() 

{

    int n;

    // Input the value of n

    printf("C Program to Calculate Summation of a Series (1 + 2 + ... + n)\n");

    printf("Enter the value of n : ");

    scanf("%d", &n);

    // Call the function to calculate the summation

    int result = calculateSummation(n);

    // Display the result

    printf("The summation of the series 1 + 2 + ... + %d is: %d\n", n, result);

    return 0;

}

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