Can you name types of variables according to their scope in code?

Variables can be classified by scope:

• Global variables — accessible throughout the entire program, usually declared outside functions and classes.
• Local variables — declared inside functions or blocks and accessible only within them.
• Block variables — in languages with block scope (e.g., JavaScript with let/const), variables are accessible only within a specific block of code (e.g., inside a loop or conditional statement).
• Static variables — retain their value between function calls but are only visible within the function (e.g., static in C).

Example in JavaScript:

let globalVar = 'global'; // global variable

function example() {
  let localVar = 'local'; // local variable
  if (true) {
    let blockVar = 'block variable';
    console.log(blockVar); // accessible here
  }
  // console.log(blockVar); // error, blockVar is not visible here
}