Pi - Simple English Wikipedia, the free encyclopedia
Pi is often written as π, or the Greek letter π as a shortcut. Pi is also an irrational number, meaning it cannot be written as a fraction (), where 'a' and 'b' are integers (whole numbers). This basically means that the digits of pi that are to the right of the decimal go forever—without repeating in a pattern, and that it is impossible to write the exact value of pi as a number.
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