Exercise on Variable and Arrow Function || Variable and Arrow Function in TypeScript

In this video,I explained a simple exercise in variable and arrow function concept in TypeScript. 

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exercise_variable.ts - 

// Create a simple and easy mathematical calculator

let p: any;

let q: any;

p= 30;

q= 10;

console.log("The Mathematical Calculator :- ");

console.log("The addition is: - " + (p+q));

console.log("The substraction is: - " + (p-q));

console.log("The multiplication is: - " + (p*q));

console.log("The division is: - " + (p/q));

console.log("The modulus is: - " + (p%q));

arrow_function.ts - 

// arrow function is basically a function,

// where we will NOT use the 'function' key

// => - symbol

let check = (msg) => {    //multiple lines

  console.log(msg);

  // ....

  // ...

}

let check1 = (msg1) => console.log(msg1);    //single line