C Program to Calculate the Alternating Sum of Integers (1-99)

This program calculates the alternating sum of the first 99 positive integers (1-99) and prints the result.

The variable 'sn' is initialized to 0 and represents the sum. The variable 'sign' is initialized to 1 and alternates between positive and negative values (-1 and 1) as each term is added to the sum.

The for loop iterates through the numbers 1-99 and adds each number multiplied by the current sign to the sum. The sign is then changed to the opposite value for the next iteration.

After the loop completes, the final value of 'sn' is printed to the console.