michael@0: // Copyright 2009 the Sputnik authors.  All rights reserved.
michael@0: // This code is governed by the BSD license found in the LICENSE file.
michael@0: 
michael@0: /**
michael@0:  * The Identifier in a FunctionExpression can be referenced from inside the FunctionExpression's FunctionBody to allow the function calling itself recursively
michael@0:  *
michael@0:  * @path ch13/13.0/S13_A3_T1.js
michael@0:  * @description Creating a recursive function that calculates factorial, as a variable.
michael@0:  * Function call itself by it`s name
michael@0:  */
michael@0: 
michael@0: var __func = function __exp__func(arg){
michael@0:     if (arg === 1) {
michael@0:     	return arg;
michael@0:     } else {
michael@0:     	return __exp__func(arg-1)*arg;
michael@0:     }
michael@0: };
michael@0: 
michael@0: var fact_of_3 =  __func(3);
michael@0: 
michael@0: //////////////////////////////////////////////////////////////////////////////
michael@0: //CHECK#1
michael@0: if (fact_of_3 !== 6) {
michael@0: 	$ERROR("#1: fact_of_3 === 6. Actual: fact_of_3 ==="+fact_of_3);
michael@0: }
michael@0: //
michael@0: //////////////////////////////////////////////////////////////////////////////
michael@0: