function sayHello(args="naam nahi hai"){
return "Hello"+args;
}
let add=function(i,j){
return i+j;
}
let sub=(i,j)=> i-j;
console.log(add(20,10));
console.log(sayHello());
console.log(sayHello("manuu"));
console.log(sub(20,10));
this code is used to add and sub the values and print them along with the string
