Write a program, which evaluates the following expression as real

value:

x = 1 - 1 / 2 + 1 / 4 - 1 / 6 +1 / 8 - 1 / 10 - . .

The main program allows the user to input an integer for accuracy (number of terms). The main program must use while loop structure and prints answer up to two-digits after the decimal point.