**According to Joy of Pi, the value of pi to 100 decimal places is expressed as 3.1415926535897932384626433832795028841971693993751058209749445923078 164062862089986280348253421170679.** Pi is an irrational number with a limitless, non-repeating decimal expansion.

Pi is a constant that represents the ratio of a circle's circumference to its diameter. Despite the constant being a ratio, it is irrational, and, therefore, a non-repeating number. It has a limitless number of decimals. As of October 2011, a Japanese mathematician and systems engineer, Shigeru Kondo, calculated pi out to its first 10 trillion digits. This broke a previous world record of 5 trillion digits calculated by Kondo just one year earlier.