function-scope.js

function myFunc() {
  // Declare a variable inside myFunc's funciton scope
  var x = 1;
  console.log(x);

  if (true) {
    var y = 2;
    console.log(y);
  }
  console.log(y);
}

// Call the function
myFunc();

// Attempt to access x outside of the function scope is not possible
console.log(x); // Uncaught ReferenceError: x is not defined