Processing Characters in Strings

It is also possible to loop over the characters of a string. The general form of a for loop over a string is as follows:

As with a for loop over a list, the loop variable gets assigned a new value at the beginning of each iteration. In the case of a loop over a string, the variable is assigned a single character.

For example, we can loop over each character in a string, printing the uppercase letters:

In the previous code, variable ch is assigned country[0] before the first iteration, country[1] before the second, and so on. The loop iterates twenty-four times (once per character) and the if statement block is executed three times (once per uppercase letter).