Example of var keyword visibility

test.js

// Example of var keyword visibility
if ( true ) {
  var x = 20;
}

function set() {
  var x = 50;
  // Write the values in the console
  console.log(x);  // Result : 50
  var y = 30;
}

// Call the set() function
set();

// Write the values in the console
console.log(x);  // Result : 20
console.log(y);  // Result : Error not defined