TypeScript Variables

TypeScript follows the same rules as JavaScript for variable declarations. TypeScript variables can be declared using: varlet, and const.


Similar to JavaScript, we can declare variables in TypeScript using the var keyword. The scoping rules also remain the same as in JavaScript.


The let declarations follow the same syntax as var declarations. Unlike variables declared with var, variables declared with let have a block-scope. This means that the scope of let variables is limited to their containing block.


Variables can be declared using const similar to var or let declarations. The const makes a variable a constant where its value cannot be changed. Const variables have the same scoping rules as let variables.

TypeScript Var, Let, and Const Examples

var x = 10;
let user = "DotNetCrunch";
const PI = 3.14;