Merge pull request #961 from boriel-basic/docs

doc: add EXP() documentation

Author: boriel

docs/exp.md

@@ -0,0 +1,31 @@
+# EXP
+
+## Syntax
+
+```
+EXP(numericExpression)
+```
+
+
+## Description
+
+Returns _e_ to the power of _numeric expression_ given, 
+_e_ is a real number, which can be obtained with `EXP(1)`.
+
+Both the argument and the result are of type `Float`.
+
+## Examples
+
+```basic
+PRINT "e = "; EXP(1)
+PRINT "e^2 = "; EXP(2)
+```
+
+## Remarks
+
+*  This function is 100% Sinclair BASIC Compatible
+*  If the given argument type is not float, it will be [converted](cast.md) to float before operating with it.
+
+## See also
+
+* [LN](ln.md)