power() Operation for Float Values

Syntax	NONE `set aFloat = aFloat.power(anExponent)`
Semantics	`power()` multiplies `aFloat` `anExponent` times.
Substitutables	`aFloat`	Can be any variable or object attribute having the type Float.
	`anExponent`	Can be any variable or object attribute having the type Integer.
Examples	NONE `set aBigNumber = aFloat.power(10);`