Pi, a mathematical constant denoted by "Pi" is approximately equal to 3.14159. Several studies have been laid by popular mathematicians like Srinvasa Ramanujan, Leonhard Euler etc to find out the exact value of "Pi" and to improve their understanding on ‘Pi’.
Since Pi is an irrational number, it cannot be expressed as the ratio of any two positive integers and the decimal representation of the constant ‘Pi’ will never end. Most of the scientific applications require only up to 40 digits of the ‘Pi’, but few people have made an effort to memorize the value of increasing precision of the ‘Pi’ above 40 digits.
The below image depicts the first 10,000 digits of a Pi cycle.