The statements which perform as per the given specific conditions are known as Conditional Statements. There are four types of conditional statements in Javascript namely -

• If Condition
• Else Condition
• Else If Condition
• Switch Condition

If Statement

The If statement specifies a block executed after providing a specific condition. In simple words, if a condition is found to be true, the block of code will be executed.

The code showing the If Condition is mentioned below -

let a = 10; if(a > 5) { console.log("Hello World); } //Output: Hello World

Else Statement

The Else Statement specifies a block that will be executed when a certain condition gets false. The code showing the else condition is mentioned below -

let a = 10; if(a > 50) { console.log("Hello World); } else { console.log("Java Script is best") } //Output: Hello World

Else-If Statement

The Else-if Condition specifies the order, If condition, then else if condition, and then finally else condition.

The code showing the Else-if Condition is mentioned below -

let age = 8; if(age < 18){ console.log("You cannot drive"); } else if(age == 18) { console.log("You must have a DL); } else { console.log("You cannot drive"); } //output: You cannot drive

For instance, John goes to a restaurant and he's so hungry that he wanted to eat something without waiting. The waiter arrives and ask for the order, John hurriedly said water, bring me pizza, if pizza is not available, then burger, and if burger is also not available, then Maggi.

Many a time, in the code, there are various if-else-if conditions arrives, which is also known as the if-else ladder.

There is a simple use of ternary operators in the Conditional Statements which is also considered as the short-hand if-else and the code for the same is mentioned below -

return condition? A: B;