string test = "
This is a test. 
This is only a test.
In the event of a real emergency,
this would be more than a test.";

string s = "ABCDE";
byte c = s[2];
print(c);
c = s[3];
print(c);
print(s);
s[2] = 0x20;
print(s);
string t = "tuv";

foreach byte c in t
    {
    int i = c;
    prin(c);
    prin(" = ");
    print(i);
    }

print(test);
print("");

print("count of occurences of letters in above string");
for (int i=0; i<256; i += 1)
    {
    int count = countChar(test, i);
    if (count > 0)
	{
	byte b = i;
        prin(b);
	prin(" ");
	print(count);
	}
    }

to countChar(string s, byte target) into int count
{
foreach byte c in s
    {
    if (c == target)
        count = count + 1;
    }
}