functionScope.js

function checkVar() {
	var validate = 1; //Make it 0 to execute else block
	if(validate) {
		var varName = "test"; //comment this line to confirm exception 
		console.log(varName);
	}
	else{
		console.log(varName);	//varName is accessible with value undefined
	}
	console.log(varName); // varName is accessible and defined if validate = 1, varName is accessible but undefined if validate = 0

}
checkVar();