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This reference is for Processing 3.0+. If you have a previous version, use the reference included with your software in the Help menu. If you see any errors or have suggestions, please let us know. If you prefer a more technical reference, visit the Processing Core Javadoc and Libraries Javadoc.

Name | ### atan()
Examples |
    float a = PI/3;
    float t = tan(a);
    float at = atan(t);
    // Prints "1.0471976 : 1.7320509 : 1.0471976"
    println(a + " : " + t + " : " +  at);
    float a = PI + PI/3.0;
    float t = tan(a);
    float at = atan(t);
    // Prints "4.1887903 : 1.7320513 : 1.0471977"
    println(a + " : " + t + " : " +  at);
Description | The inverse of tan(), returns the arc tangent of a value. This function expects the values in the range of -Infinity to Infinity (exclusive) and values are returned in the range -PI/2 to PI/2 .
Syntax |
    atan(value)
Parameters |
value | float: -Infinity to Infinity (exclusive)
Returns | float
Related | tan() asin() acos()

Updated on July 4, 2018 11:56:42am EDT