Conditional statements allow your code to make decisions and execute different blocks of code based on whether a condition is true or false.

• if statement: Executes a block of code if a specified condition is true.

  let temperature = 25;
  if (temperature > 20) {
    console.log("It's a warm day!");
  }
  

• else statement: Executes a block of code if the if condition is false.

  let age = 16;
  if (age >= 18) {
    console.log("You are an adult.");
  } else {
    console.log("You are a minor.");
  }
  

• else if statement: Allows you to test multiple conditions in sequence. If an if condition is false, the next else if condition is checked, and so on.

  let score = 85;
  if (score >= 90) {
    console.log("Grade: A");
  } else if (score >= 80) {
    console.log("Grade: B"); // This will be executed
  } else if (score >= 70) {
    console.log("Grade: C");
  } else {
    console.log("Grade: D or F");
  }
  

Conditions are boolean expressions that evaluate to true or false.