The atan2 function calculates the angle, in radians, between the positive x-axis and the ray from the origin to the point (y, x).

Syntax ​

atan2( Y, X )

Arguments ​

• X: X coordinate (a real number).
• Y: Y coordinate (a real number).

Returns ​

Returns the angle in radians between the positive x-axis and the ray from the origin to the point (y, x).

Examples ​

This example returns 1.571:

print atan2( 1,0 )