"elseif" syntax in JavaScript

In JavaScript, when you want to run different blocks of code based on multiple conditions, you use the if...else if...else statement structure. There isn’t an elseif keyword in JavaScript — it’s actually written as else if (with a space).

Here’s how it works:

let score = 85;
if (score >= 90) {
  console.log("Excellent");
} else if (score >= 75) {
  console.log("Good");
} else if (score >= 60) {
  console.log("Average");
} else {
  console.log("Needs Improvement");
}

Key points:

• ✅ JavaScript does not have a keyword called elseif. It’s always else if with a space.
  
• ✅ You can chain as many else if conditions as needed.
  
• ✅ The else block at the end is optional and used as a fallback.
  

Why use else if?

• It improves code readability.
  
• Allows you to handle multiple conditions cleanly.
  
• Helps prevent deeply nested if statements.
  

Common mistake:

// ❌ Incorrect
elseif (condition) {
  // code
}
// ✅ Correct
else if (condition) {
  // code
}

In summary, if you're checking more than one condition in JavaScript, remember to use else if — two words, not one. It's a simple but important syntax rule that keeps your code working properly.