pi()

Published Jul 4, 2023Updated Jul 15, 2023
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The pi() function returns the value of PI (π).

Syntax

pi();

The pi() function has no parameters. It returns the value of π as a float. M_PI, being a constant, also returns the same value.

Codebyte Example

Using pi() to return the value of π:

Code
Output
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Some other predefined named constants related to π are:

Constant Value
M_PI_2 π/2 or 1.570796
M_PI_4 π/4 or 0.785398
M_1_PI 1/π or 0.318309
M_2_PI 2/π or 0.636619
M_SQRTPI sqrt(π) or 1.772453
M_2_SQRTPI 2/sqrt(π) or 1.128379

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