JavaScript Tutorial ✦

It is used to control the flow of the code.
When the condition inside the if block is true, it will execute the code inside the {} curly braces.
If the condition is not met, it will not run that block of code.

If you want to run a different block of code when the if condition is not met, you can write that code inside the else block.

Syntax:

if (condition) {
  // block of code that runs when condition is true
} else {
  // block of code that runs when condition is false
}

Example:

if (name === "Alan") {
  console.log("Your name is Alan"); // when the condition is true
} else {
  console.log("You are not Alan"); // when the condition is false
}

Also, you can write another condition inside the else block using another if.
This is useful when you want to check multiple things one after another.

For example, if you want to check if a person’s age is above 20, and if not, then check if they are at least 18, you can write it like this:

if (age >= 20) {
  console.log("Above 20 aged");
} else {
  if (age >= 18) {
    console.log("You are aged more than 18 but not more than 20");
  }
}

That’s how you can use if-else statements. It’s a crucial part in every programming language and can be used in many ways — nested, non-nested, etc.

if (age >= 18) {
  console.log('Adult');
} else {
  console.log('Minor');
}