Formulas and Functions
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PI

The PI function returns the approximate value of π (pi), the ratio of a circle’s circumference to its diameter.

PI()

Notes

  • The PI function does not have any arguments. However, you must include the brackets.

  • The PI function is accurate to 15 decimal places.

Examples

=PI() returns approximately 3.14159265358979.

=SIN(PI()/2) returns 1, the sine of π/2 radians or 90 degrees.

See alsoSQRTPI
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