Below I have the simplest code. In my name function its all good, it works but in the User_age function I get the following error: 
User_age is not a function.
What am I doing wrong?
User_age();
function User_age()
{
    var age = promt("what is your age");
    var printAge = "your age is" + age;
    console.log(printAge);
}
name();
function name(){
    var username = prompt("what is your name");
    var greed = "hello" + username;
    console.log(greed);
}