Type assertion works like a typecasting in other languages, but it doesn’t perform type checking or restructuring of data in other languages like C# and Java. The typecasting comes with runtime support whereas type assertion has no impact on runtime. However, type assertions are used purely by the compiler and provide hints to the compiler on how we want our code to be analyzed.
Example :
let empCode: any = 007;
let employeeCode = <number> code;
console.log(typeof(employeeCode)); //Output: number
