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18.WhileLoops.c
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18.WhileLoops.c
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#include <stdio.h> // Include standard input-output library
// Function prototype
int sumOfIntegers(int number); // Function to calculate the sum of integers from 1 to the given number
// Main function - Program execution starts here
int main() {
int num; // Declare a variable to hold the user's input
// Prompt the user to enter a positive integer
printf("Enter a positive integer: ");
scanf("%d", &num); // Read the integer from user input
// Call the function to calculate and display the sum
int sum = sumOfIntegers(num);
printf("The sum of integers from 1 to %d is: %d\n", num, sum); // Output the result
return 0; // End of the main function, returns 0 to indicate successful execution
}
// Function to calculate the sum of integers from 1 to the given number
int sumOfIntegers(int number) {
int sum = 0; // Initialize sum to 0
int i = 1; // Initialize loop counter
// Loop to sum integers from 1 to 'number'
while (i <= number) {
sum += i; // Add the current value of i to sum
i++; // Increment i by 1
}
return sum; // Return the calculated sum
}