Practice String in CS Thinking
Use these practice problems to test your method after reviewing the concept explanation and worked examples.
Quick Recap
A data type that represents a sequence of characters (text), enclosed in quotation marks.
A string is text in code — anything between quotes. Numbers inside quotes are text too: '42' is a string, not a number.
Example 1
easyGiven s = 'Hello World', what is: (a) LENGTH(s), (b) s[0], (c) s[6..10] (substring from index 6 to 10)?
Example 2
mediumWhat is the result of concatenating 'Score: ' + STRING(95) + '%'?
Example 3
easyGiven name = 'Alice', what does name + ' is ' + STRING(15) + ' years old' produce?
Example 4
mediumGiven word = 'PROGRAMMING', what is the result of each operation?
(a) LENGTH(word)
(b) word[0] + word[LENGTH(word) - 1]
(c) SUBSTRING(word, 3, 4)