Sometimes, one condition is not enough, and for that, in TypeScript (as in other programming languages), there is the if-else construct. For example, if you need to create a calculator, you, as a true programmer, will do it using the if-else construct, like this:

In this code, we have 3 variables: number a, number b, and the operation that will be performed between them. Using the if-else construct, we determine which operation will be applied to these two numbers. If we don't find a suitable operation, we will display a message indicating that such an operation is not available!

Now let's take a closer look at the syntax we're using:

Note that if one of the conditions is met, we exit the if-else statement, and the remaining blocks are ignored.

Unlike else if, the else block does not have a condition block. This is because else executes only if all previous conditions were false.

The if-else construct is often used for a variety of tasks, from checking if a number is positive to writing artificial intelligence.

You can also choose not to use else-if blocks and use only if and else, for example:

This way, we can experiment and use such a construct for various purposes!