JavaScript Full Course ❤️ | Javascript Conditional Statement | Lecture 9
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JavaScript conditional statements allow you to execute different blocks of code based on whether a specified condition evaluates to true or false. They are fundamental for controlling the flow of a program and making decisions.
The primary types of conditional statements in JavaScript are:
if statement: Executes a block of code only if a specified condition is true.
JavaScript
if (condition) {
// code to be executed if condition is true
}
if...else statement: Executes one block of code if the condition is true, and a different block of code if the condition is false.
JavaScript
if (condition) {
// code to be executed if condition is true
} else {
// code to be executed if condition is false
}
if...else if...else statement: Allows for testing multiple conditions in sequence. If the first if condition is false, it checks the else if condition(s), and if all are false, it executes the final else block.
JavaScript
if (condition1) {
// code if condition1 is true
} else if (condition2) {
// code if condition2 is true
} else {
// code if all conditions are false
}
switch statement: Evaluates an expression and executes the block of code associated with a matching case value. It is often preferred over lengthy if...else if chains when dealing with a single variable that can have many possible values.
JavaScript
switch (expression) {
case value1:
// code if expression matches value1
break;
case value2:
// code if expression matches value2
break;
default:
// code if no case matches
}
Ternary Operator (Conditional Operator): A shorthand for simple if...else statements, often used for assigning values based on a condition.
JavaScript
variable = (condition) ? expressionIfTrue : expressionIfFalse;
In this video we will discuss about Javascript variables -
What are Conditional Operators ?
What is If?
What is IF-Else?
What is switch ?
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