Switch-case statement in typescript with examples

Switch statement in typescript with examples:

switch statement is used to run a block of code based on the result of an expression. Unlike the if-else block, we can use switch with any type of return value of an expression, not only boolean.

In this post, I will show you how to use switch with an example.

Syntax of switch:

switch(expression){
    case expression1:
        break;
    case expression2:
        break;
        ...
        ...
        ...
    default:
        break;
}

Based on the value of expression, the control moves to the case statement that matches this expression.
We can have unlimited numbers of case blocks.
The break statement at the end of a case statement indicates that the control exits the switch block once it executes the code for a case block.
The default case is optional. This case runs if the given expression doesn’t match with any of the cases.

Example 1: Switch block with numbers:

Let’s take a look at the below example:

let givenValue = 1;

switch(givenValue){
    case 0:
        console.log('Zero');
        break;
    case 1:
        console.log('One');
        break;
    case 2:
        console.log('Two');
        break;
    case 3:
        console.log('Three');
        break;
    case 4:
        console.log('Four');
        break;
    case 5:
        console.log('Five');
        break;
}

In this example, based on the value of givenValue, it prints a message if givenValue is 0,1,2,3,4 or 5. For any other values, it will not print any message.

Example 2: Switch block with characters:

We can also use a switch block with characters:

let givenValue = 'a';

switch(givenValue){
    case 'a':
        console.log('Vowel');
        break;
    case 'e':
        console.log('Vowel');
        break;
    case 'i':
        console.log('Vowel');
        break;
    case 'o':
        console.log('Vowel');
        break;
    case 'u':
        console.log('Vowel');
        break;
    default:
        console.log('Consonant');
        break;
}

Based on the value of givenValue, it will print a message Vowel or Consonant.

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Switch-case statement in typescript with examples

Switch statement in typescript with examples:

Syntax of switch:

Example 1: Switch block with numbers:

Example 2: Switch block with characters:

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