String CS Thinking Example 1

Follow the full solution, then compare it with the other examples linked below.

Example 1

easy
Given s = 'Hello World', what is: (a) LENGTH(s), (b) s[0], (c) s[6..10] (substring from index 6 to 10)?

Solution

  1. 1
    Step 1: (a) Count all characters including the space: LENGTH = 11.
  2. 2
    Step 2: (b) s[0] = 'H' (first character, zero-indexed).
  3. 3
    Step 3: (c) s[6..10] = 'World' (characters at indices 6, 7, 8, 9, 10).

Answer

(a) 11, (b) 'H', (c) 'World'.
Strings are sequences of characters accessed by index. Key operations include finding length, accessing individual characters, and extracting substrings.

About String

A data type that represents a sequence of characters (text), enclosed in quotation marks. Strings support operations like concatenation (joining), slicing (extracting substrings), searching, and comparison, and can contain letters, digits, spaces, and special characters.

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More String Examples

Example 2 medium

What is the result of concatenating 'Score: ' + STRING(95) + '%'?

Example 3 easy

Given name = 'Alice', what does name + ' is ' + STRING(15) + ' years old' produce?

Example 4 medium

Given word = 'PROGRAMMING', what is the result of each operation? (a) LENGTH(word) (b) word[0] + wor

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