EN
TypeScript - primitive types
3 points
In TypeScript there are available following primitive types.
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let a = 123;2
let b = 3.14;3
let c : number = 123;4
let d : number = 3.14;5
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console.log(`a=${a} b=${b} c=${c} d=${d}`);Output:
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a=123 b=3.14 c=123 d=3.14xxxxxxxxxx1
let a = 'Hello world!';2
let b : string = 'Hello world!';3
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console.log(`a='${a}' b='${b}'`);Output:
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a='Hello world!' b='Hello world!'xxxxxxxxxx1
let a = true;2
let b : boolean = false;3
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console.log(`a=${a} b=${b}`);Output:
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a=true b=falsexxxxxxxxxx1
function doNothing() : void2
{3
// nothing here ...4
}Note: this type is useful with functions. It is possible to create variable with
voidtype (let value : void = null) but it allows later to assign onlynullorundefined.
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let a : any = 'text';2
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a = 123;4
a = true;5
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console.log(`a=${a}`);7
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Output:
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a=trueNote: with this type we can assign anything to variable. It shouldn't be used if it is not necessary.
