Category: javascript
Conditional statements
Published on 29 Jun 2026
Explanation
Conditional statements allow JavaScript to execute different code blocks based on conditions.
Code:
let age = 20;
if (age >= 18) {
console.log('Adult');
}
Explanation
The if...else statement executes one block if the condition is true and another if it is false.
Code:
let marks = 40;
if (marks >= 50) {
console.log('Pass');
} else {
console.log('Fail');
}
Explanation
The else if statement checks multiple conditions sequentially.
Code:
let score = 85;
if (score >= 90) {
console.log('A');
} else if (score >= 75) {
console.log('B');
}
Explanation
The switch statement is useful when comparing a single value against multiple cases.
Code:
let day = 2;
switch(day) {
case 1: console.log('Monday'); break;
case 2: console.log('Tuesday'); break;
}
Explanation
The ternary operator provides a concise way to write simple if...else conditions.
Code:
let age = 18; let result = age >= 18 ? 'Eligible' : 'Not Eligible';