How to write an inline IF statement in JavaScript ?

An inline if statement in JavaScript is also known as a ternary operator. It is a shorthand way of writing an if-else statement in a single line. The syntax for an inline if statement is as follows:

condition ? expressionIfTrue : expressionIfFalse

Here, condition is the expression that is evaluated, expressionIfTrue is the value returned if the condition is true, and expressionIfFalse is the value returned if the condition is false.

For example, let's say we want to check if a number is even or odd and print a message accordingly. We can use an inline if statement as follows:

const num = 5;
console.log(num % 2 === 0 ? "Even" : "Odd"); // Output: Odd

In this example, the condition num % 2 === 0 checks if the number is even or not. If it is true, the expression "Even" is returned, otherwise, the expression "Odd" is returned.

Another example of using an inline if statement is to check if a variable is null or undefined and assign a default value to it. We can do this as follows:

let name = null;
const defaultName = "John Doe";
name = name ? name : defaultName;
console.log(name); // Output: John Doe

In this example, the condition name checks if the variable name is null or undefined. If it is true, the expression defaultName is assigned to name, otherwise, the value of name remains unchanged.