Exercises for Programmers

2	Counting the Number of Characters

Create a program that prompts for an input string and displays output that shows the input string and the number of characters the string contains.

Example Output

Constraints

• Be sure the output contains the original string.

• Use a single output statement to construct the output.

• Use a built-in function of the programming language to determine the length of the string.

Challenges

• If the user enters nothing, state that the user must enter something into the program.

• Implement this program using a graphical user interface and update the character counter every time a key is pressed. If your language doesn’t have a particularly friendly GUI library, try doing ...