Hello friends!
In today’s blog, I’ll explain how to learn and understand JavaScript if-else conditions, imagining teaching a robot how to think. You’d say, If the road is clear, walk. Else wait. That’s exactly what the if-else statement does in JavaScript — it gives your code the ability to think and react.

The if-else condition acts like a crossroads in your program. Based on a certain situation called a condition, JavaScript chooses which path to take. This simple decision-making tool is what makes your websites smart, responsive, and interactive.

Whether it’s checking if a user is logged in, validating form input, or responding to a click, if-else is the brain behind it.

Example

If the hour is less than 20, output "Good day":
let hour = new Date().getHours();
if (hour < 20) {
document.getElementById("demo").innerHTML = "Good day";
}

In JavaScript we have the following conditional statements:

• Use if to specify a block of code to be executed, if a specified condition is true
• Use else to specify a block of code to be executed, if the same condition is false
• Use else if to specify a new condition to test, if the first condition is false
• Use switch to select one of many blocks of code to be executed.

Syntax

The if statement specifies a block of code to be executed if a condition is true:

if (condition) {
// block of code to be executed if the condition is true
}
The else statement specifies a block of code to be executed if the condition is false:

if (condition) {
// block of code to be executed if the condition is true
} else {
// block of code to be executed if the condition is false
}
The else if statement specifies a new condition if the first condition is false:

if (condition1) {
// block of code to be executed if condition1 is true
} else if (condition2) {
// block of code to be executed if the condition1 is false and condition2 is true
} else {
// block of code to be executed if the condition1 is false and condition2 is false
}
conclusion
Mastering the if-else condition in JavaScript is like giving your code the power to think and decide. It's the brain behind dynamic decisions. Once you understand its logic, you're not just coding—you’re teaching your program to make smart choices. Keep practicing, stay curious, and let your code do the thinking!

Note: Some references and examples in this blog are inspired by W3Schools JavaScript if-else tutorial