CODE EXAMPLE FOR TYPESCRIPT

take two inputs from user and add them using callback function

const add = (input1, input2) =>{
    console.log(input1+input2);
    return input1+input2;
}
const inp = (abc) =>{
    let a = parseInt(prompt("Enter first number"));
    let b = parseInt(prompt("Enter second number"));
    inp1 =Number(a);
    inp2 =Number(b);
    return abc(inp1,inp2);
}
alert(inp(add));