1、toUpperCase函数:
将整个字符串转成大写字母
var str = "all"
var strNew = str.toUpperCase()
console.log(strNew)
2、toLowerCase函数:
将整个字符串转成小写字母
var str = "ALL"
var strNew = str.toLowerCase()
console.log(strNew)
3、今日微语:
彦秉成2023加油呀!
将整个字符串转成大写字母
var str = "all"
var strNew = str.toUpperCase()
console.log(strNew)
将整个字符串转成小写字母
var str = "ALL"
var strNew = str.toLowerCase()
console.log(strNew)
彦秉成2023加油呀!