reactjs - How do i use for loops with react?

I'm very new to react and all I really want is a simple for loop that creates menuitem elements for each user in my array with the title of it being their firstname. So this is how I would write it, but I have no clue of how to do this in react. I think it should be with a map maybe but I cant seem to get it to work either hopefully anyone out here can help me.

for (var i = 0; i < Users.length; i++) {

  User.firstname[i]
}

Answer

The render method of your component, or your stateless component function, returns the elements to be rendered.

If you want to use a loop, that's fine:

render() {
    let menuItems = [];

    for (var i = 0; i < Users.length; i++) {
        menuItems.push(User.firstname[i]);
    }
    return 
{menuItems}
;
}

More common would be to see a more functional style, such as using a map to return the array of elements:

render() {

    return 

    {
        Users.map((user, i) =>
            User.firstname[i])
    }
    
;
}

Note that in either case, you are missing the key property from each element of your array, so you will see warnings. Each element in an array should have a unique key, preferably some form of ID rather than just the array index.