Hi @aditikochhar and welcome to the community!

There are several things going on here that is will cause errors:

• You cannot use spaces in function names. Try renaming your function to  addTwo instead of  add<space>Two.
• You re-define  x inside your function by using the  var keyword. That way, the  x  inside your function is a different  x than the  x in the first line.

This should fix the errors mostly, however I also do recommend to pass the variable that needs the addition as a function argument as well as giving the variable of the product a different name (for clarity). Your code will look something like this then:

var x = 1;
function addTwo(number) {
  return number + 2;
};

var y = addTwo(x);

y = y + 1;

console.log(y); // Should print the number 4 (1 + 2 + 1)

Again, these last changes are optional but do improve the quality of the code (at least in my opinion). Please let us know if you have any more questions.

PS: next time, please choose a title that fits the topic and put your code in a code block.