how arrows work in ts code example

Example 1: arrow function in typescript

//prototype 
const/let <FunctionName> = (params: type) :<ReturnType> =>{
  ....
};

const PrintName =  (name: string): string => {
  return console.log("my name is " , name) ;
}

Example 2: arrow function in ts

// ES6: With arrow function  
var getResult = (username: string, points: number): string => {  
  return `${ username } scored ${ points } points!`;  
};

getResult('joyous jackal' , 100);