| Index

| Reference for Wiring 1.0 (ALPHA) 0019+. If you have a previous version, use the reference included with your software. If you see any errors or have any comments, let us know.

Name |  | ### HALF_PI (1.57079...)
Examples |  |
Description |  | HALF_PI is a mathematical constant with the value 1.57079632679489661923. It is half the ratio of the circumference of a circle to its diameter. It is useful in combination with the trigonometric functions sin() and cos().
Syntax |  |
    HALF_PI
Usage |  | Application
Related |  | PI TWO_PI