## The problem

*PI*, or π is a mathematical constant, the ratio of a circle's circumference to its diameter, commonly approximated as 3.14159. It has been represented by the Greek letter "π" since the mid-18th century, though it is also sometimes spelled out as "pi" (/paɪ/).

PI can be computed using the following formula:

PI = 4.0 * (1 - (1.0/3) + (1.0/5) - (1.0/7) + (1.0/9) - (1.0/11) ...)

Write a program that displays the result of 4 X (1 - (1.0/3) + (1.0/5) - (1.0/7) + (1.0/9) - (1.0/11)) and (1 - (1.0/3) + (1.0/5) - (1.0/7) + (1.0/9) - (1.0/11) + (1.0/13)). Use 1.0 instead of 1 in your program.