Practice For Loop in CS Thinking
Use these practice problems to test your method after reviewing the concept explanation and worked examples.
Quick Recap
A control structure that repeats a block of code a specific number of times or for each item in a collection.
A for loop is like 'do this for each...' — for each student in the class, print their name. For each number from 1 to 10, add it to the total.
Example 1
easyTrace: FOR i = 0 TO 4: OUTPUT i * i.
Example 2
mediumConvert this FOR loop to a WHILE loop: FOR i = 1 TO 5: OUTPUT i.
Example 3
mediumWrite a FOR loop that calculates 5! = 5 \times 4 \times 3 \times 2 \times 1.
Example 4
mediumWhat does this code output?
SET scores = [85, 92, 78, 95, 88]
SET highest = scores[0]
FOR i = 1 TO LENGTH(scores) - 1
IF scores[i] > highest THEN
SET highest = scores[i]
END IF
END FOR
OUTPUT highest