==== <code>ATN (n)</code> ====
: FUNCTION: Returns the arctangent of n.: The result can be changed into radian or angular measure with the commands DEG or RAD : Similar commands: COS, DEG, RAD, SIN, TAN : Example:<pre>PRINT ATN(1)0.785398163</pre>
==== <code>BIN$ (i1,[i2])</code> ====