/* This is the tenth lab of Lab EE107
The purpose of this lab for finding out the triangular numbers via
calling a function.
Creating the code and free of syntax and grammatical errors.
Author: Ekwegbalum Unachukwu
Star ID:do2170dt
Date: April 2nd, 2024.
*/


#include <stdio.h>

// Function to calculate triangular number
int calculateTriangularNumber_EU(int n_EU) {
    return (n_EU * (n_EU + 1)) / 2;
}

int main() {
    int n_EU, triangularNumber_EU;

    // Input the value of n
    printf("Enter the value of n to find the nth triangular number: \n");
    scanf("%d", &n_EU);

    // Check if the input is valid
    if (n_EU <= 0) {
        printf("Please enter a positive integer.\n");
        return 1; // Exit with error code
    }

    // Calculate the nth triangular number
    triangularNumber_EU = calculateTriangularNumber_EU(n_EU);

    // Display the result
    printf("The %dth triangular number is: %d\n", n_EU, triangularNumber_EU);

    return 0;
}