This study notes covers Deep Dive: Type Casting within Data Types for GCSE Computer Science. Revise Data Types in 3.2 Programming for GCSE Computer Science with 19 exam-style questions and 10 flashcards. This is a high-frequency topic, so it is worth revising until the explanation feels precise and repeatable. It is section 6 of 9 in this topic. Use this study notes to connect the idea to the wider topic before moving on to questions and flashcards.
Deep Dive: Type Casting
Converting between types:
int("42")→ 42 (string to integer)str(42)→ "42" (integer to string)float("3.14")→ 3.14 (string to real)int(3.9)→ 3 (real to integer, truncates)
Why cast? You can't add "5" + 3 (string + integer). You need: int("5") + 3 = 8
Practice questions for Data Types
Which data type is most appropriate for storing a student's age?
A programmer is creating a system to track gym members. State the most appropriate data type for each of the following and justify your choice: (a) the member's surname, (b) the number of visits this month, (c) whether the membership is active.