Page 99 - TP-Play_V-2.0_Book-8
P. 99
LOOPS IN A PROGRAM
A loop is used to execute instructions or a block of code multiple times, without writing it
repeatedly. A sequence of instructions when repeated for a fixed number of times or until
a condition is true is called a loop. When a loop repeats forever (endlessly), it is called an
infinite loop. There are two types of loops.
Counting loops: These repeat a certain number of times.
Conditional loops: These repeat until a certain condition is reached which means they
keep going until some condition remains true.
Look at this example:
Move 1 down Repeat 4 times
Robby has to paint these blank Move 1 down (Move 1 down)
boxes to make a letter ‘U’ Move 1 down
Move 1 down
Move 1 right Repeat 3 times
Move 1 right (Move 1 right )
Move 1 right
Move 1 up Repeat 4 times
Move 1 up (Move 1 up)
The program will be
Move 1 up
Move 1 up Computational Thinking
A. Write your answer. Program without a loop Program with a loop
If (you are a girl) AND (you are born in April)
Then
Write “Both”
Else
Write “None”
B. Write the output of the following programs:
1. Start
Repeat 6 times
(
Put a cross
Move 1 step right
Put a tick
Move 1 step down
)
2.
Repeat 3 times
(
Colour Yellow
Skip One Triangle
) Start
The CT Corner! (Algorithmic Intelligence) 99

