var str1="hello";
	var str2="world";
	var str3;
	var start = new Date().getTime();
	for (i = 0; i < 100000; ++i) {
	str3=str1+str2;
	}
	var end = new Date().getTime();
	var time = end - start;
 
	print('Execution time using + operator: ' + time);
 
	// USING CONCAT OPERATOR
 
	start = new Date().getTime();
	for (i = 0; i < 100000; ++i) {
	str3=str1.concat(str2);
	}
	end = new Date().getTime();
	time = end - start;
	print('Execution time using CONCAT operator: ' + time);

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