ATAN
Return the arc tangent of a float value.
Example
PRINT ATAN(0.5)
LINE BREAK
DEF var#=ATAN(0.4)
PRINT var#
LINE BREAK
DEF var#=0.4
PRINT ATAN(var#)
Output
0.46364760900081
0.38050637711236
0.38050637711236
0.38050637711236
0.38050637711236