字符串函数举例 print a; space 3);cd1234" qwerty cd1234 print ucas(Qwerty) QWERTY print Icase( lkjhgfas kihgfas <<> 2021/2222021/2/22 9 字符串函数举例 print a；space(3)；"cd1234" qwertyu cd1234 print ucase("QWerty") QWERTY print lcase("lkjhGFas") lkjhgfas