Problem-Solving and Programming: Data

What you'll learn

How programs handle different kinds of data.

Key ideas

• Data types: integer, string, boolean, real (float) and char.
• Arrays store multiple values; the index gives position.
• Validation checks input is sensible.

Exam tips

• Match a data type to the data.
• Remember validation checks reasonableness, not truth.

Common mistakes

• Mixing up data types.
• Off-by-one index errors.