Typescript If Statement

Typescript if statement

Created By: chatGPT

In TypeScript, the if statement is used to perform conditional execution of code based on whether a specified condition is true or false. The general syntax is as follows:

if (condition) {
    // code to be executed if condition is true
}

You can also extend the if statement with an optional else clause. This allows you to define an alternative block of code that runs when the condition is false.

if (condition) {
    // code to be executed if condition is true
} else {
    // code to be executed if condition is false
}

For more complex conditions, you can use else if to check multiple conditions in sequence. The code block will evaluate the conditions from top to bottom.

if (condition1) {
    // code for condition1
} else if (condition2) {
    // code for condition2
} else {
    // code if none of the conditions are true
}

Here's an example of using an if statement to check if a number is positive, negative, or zero:

let number: number = -5;

if (number > 0) {
    console.log('The number is positive.');
} else if (number < 0) {
    console.log('The number is negative.');
} else {
    console.log('The number is zero.');
}

In this example, the program evaluates the variable number. It will output 'The number is negative.' because -5 is less than zero.

let number: number = -5;

if (number > 0) {
    console.log('The number is positive.');
} else if (number < 0) {
    console.log('The number is negative.');
} else {
    console.log('The number is zero.');
}

Remember to use brackets {} to enclose the code blocks within your if, else if, and else statements for clear structure and readability.

if (condition) {
    // do something
} else {
    // do something else
}