Scope of Variables:

Scope determines the visibility or accessibility of variables in different parts of your code.

1. Global Scope:

Variables declared outside any function or block have global scope, meaning they can be accessed anywhere in the program.

Example:

var globalVar = "I'm global!";
function display() {
  console.log(globalVar);  // Accessible here
}
display();

2. Local/Function Scope:

Variables declared inside a function are local to that function and can’t be accessed from outside.

Example:

function display() {
  var localVar = "I'm local!";
}
console.log(localVar);  // Error: localVar is not defined

3. Block Scope:

Variables declared with let or const within a block ({}) are limited to that block.

Example:

if (true) {
  let blockVar = "I'm block-scoped!";
}
console.log(blockVar);  // Error: blockVar is not defined