In TypeScript, there are five data types: String, Boolean, Number, Null, and Undefined.
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String: The string data type is used to represent text in TypeScript. Strings work with textual data. Strings are always enclosed in single or double quotes.
Syntax:let identifier: string = " ";
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Number: Numbers in TypeScript store floating-point values. They can be represented as both integer and fraction.
Syntax:
let identifier: number = value;
- Boolean: The boolean data type can only have one of the two values - “true” or “false”. It specifies whether a condition is true or false.
Syntax:
let identifier: Boolean = Boolean value;
- Null: Null is a variable whose value is undefined. It accepts only one value, Null.
let num: number = null;
let bool: boolean= null;
let str: string= null;
- Undefined: The undefined primitive type denotes all the uninitialised variables in TypeScript.
let num: number = undefined;
let bool: boolean= undefined;
let str: string= undefined;