JavaScript Conditional Statements

We use conditional statements to perform different actions for different decisions. In JavaScript, we have the following conditional statements.

The if Statement

You can use the if statement to specify a block of JavaScript code to be executed if a condition is true.

Syntax

if (condition) {
    a block of code to be executed if the condition is true
}

Example

If the marks of the student are more than 33 result will be passed.

if (marks > 33) {
    result = “pass”;
}

The result will be:

Pass

The else Statement

Use the else statement to specify a block of code to be executed if the condition is false.

Syntax

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
}

Example

If the marks of the student are more than 33 result will be pass or less than 33 fail.

if (marks > 33) {
    result = “pass”;
}

else {
     result = “fail”;
}

The result will be:

Fail

The else if Statement

Use the else if statement to specify a new condition if the first condition is false.

Syntax

if (condition1) {
    block of code to be executed if condition1 is true
} else if (condition2) {
    
block of code to be executed if condition1 is false and condition2 is true
} else {
    
block of code to be executed if condition1 is false and condition2 is false
}

Example:

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