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Result of the ask and wait Result of the ask and wait
command when the sprite command when the sprite
is visible is hidden
Figure 5-35: The ask and wait block may produce different outputs depending
on whether the sprite that executes it is shown or hidden .

After executing the ask and wait command, the calling script waits
for the user to press the enter key or click the check mark at the right side
of the input box. When this happens, Scratch stores the user’s input in the
answer block and continues execution at the command immediately after
the ask and wait block. To see this command block in action, take a look
at the following examples illustrating how to use it.

Reading a Number

AskAndWait The script of Figure 5-36 asks the user for her age, waits for an answer, and
.sb2 tells the user how old she will be in 10 years.





  

Figure 5-36: A script that accepts the user’s age as input

The figure shows the output of the program when the user types 18 and
presses enter on the keyboard. Notice that the program uses the join block
(from the Operators palette) to concatenate (that is, connect) two strings.

Reading Characters
AskAndWait2 The script of Figure 5-37 asks the user for his initials and then constructs
.sb2 and displays a greeting based on the user’s response.

118 Chapter 5
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