tsc --declaration nameOfTypeScriptFile.ts

tsc nameOfTypeScriptFile.ts
node convertedJavaScriptFile.js

const object = { 
    name: "GeeksforGeeks", 
    founded: 2009, 
}; 
  
console.log( 
    `The organisation is {object.name} and  
        it was founded in{object.founded}` 
);

var object = { 
    name: "GeeksforGeeks", 
    founded: 2009 
}; 
console.log("The organisation is ".concat(object.name,  
    " and it was founded in ").concat(object.founded));

declare const object: { 
    name: string; 
    founded: number; 
};

function addTwoNumbers(a: number, b: number) { 
    return a + b; 
} 
  
const n1 = 2, 
    n2 = 9; 
console.log(`The sum of {n1} and{n2}  
    is ${addTwoNumbers(n1, n2)}`);

function addTwoNumbers(a, b) { 
    return a + b; 
} 
var n1 = 2, n2 = 9; 
console.log("The sum of ".concat(n1, " and ") 
    .concat(n2, " is ").concat(addTwoNumbers(n1, n2)));

declare function addTwoNumbers(a: number, b: number): number; 
declare const n1 = 2, n2 = 9;