using System;
class MainClass {
public static void Main() {
string str = "This is a test. $23";
int i;
for(i=0; i < str.Length; i++) {
Console.Write(str[i] + " is");
if(Char.IsLower(str[i]))
Console.Write(" lowercase");
if(Char.IsUpper(str[i]))
Console.Write(" uppercase");
Console.WriteLine();
}
}
}
Output
T is uppercase
h is lowercase
i is lowercase
s is lowercase
is
i is lowercase
s is lowercase
is
a is lowercase
is
t is lowercase
e is lowercase
s is lowercase
t is lowercase
. is
is
$ is
2 is
3 is