on scope:",a);
            console.log("a in global scope:",return_global_a());
        };

        function test2() {
            var a=2;
            console.log("a in function scope:",a);
            console.log("a in global scope:",return_global_a());
        };

        function test3() {
            a=3
            console.log("a in function scope:",a);
            console.log("a in global scope:",return_global_a());
        };

        function test4() {
            var a=7
            console.log("a