javascript - 从 a-z 中选择一个随机字母

Question

How do I choose a random letter from a-z and put it into a heading in my html by itself and make it replace any other letter that was there before? I don't know if what I've done works.

function randLetter( ) {

var letters =
    ("a","b","c","d","e","f","g","h","i","j","k","l","m","n","o","p","q"
    ,"r","s","t","u","v","w","x","y","z");

var letter = letters[Math.floor(Math.random()*letters.length)];

return letter

}

$('#letter').html('letter')

Answer 1

对于大写字母，您可以使用

String.fromCharCode(65+Math.floor(Math.random() * 26))

对于小写字母

String.fromCharCode(97+Math.floor(Math.random() * 26))