foreach Examples

In IsDigits we use the underlying int Unicode value of the characters in comparisons. When printing, you cannot see this code directly, since the char type prints as characters! To see the underlying code value for a character, ch, it can be cast to an int: (int)ch

We can easily write a loop to print the unicode value of each character in a string, s. We do not need indices here, so a foreach loop is appropriate:

foreach (char ch in s) {
    Console.WriteLine("Unicode for {0} is {1}.", ch, (int)ch);

Try this in csharp.

We will have many more examples after we introduce more kinds of sequences.