random number generator using function both string and number

randNumGen.js

// genarate random number with specific digit using function 

function randNumber(n){
    return Math.floor((Math.random()*10**n));       //if you want n digit random number as a number
}
function randNumString(n){
    return (Math.random()*10**n+" ").split('.')[0];       //if you want n digit random number as a string
}


randNumber(4);             // calling the random number
randNumString(4);           //calling the random nuber as a string