node js function

1function myfunction() {
2  console.log("function");
3};
4
5myfunction() //Should say "function" in the console.
6
7function calculate(x, y, op) {
8  var answer;
9  if ( op = "add" ) {
10    answer = x + y;
11  };
12  else if ( op = "sub" ) {
13    answer = x - y;
14  };
15  else if ( op = "multi" ) {
16    answer = x * y;
17  };
18  else if ( op = "divide" ) {
19    answer = x / y;
20  };
21  else {
22    answer = "Error";
23  };
24  return answer;
25};
26
27console.log(calculate(15, 3, "divide")); //Should say 5 in console.
28//I hope I helped!

1function myData() { 
2   return 123; 
3} 
4console.log(myData());