Data Types Flashcards

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Note: We may include questions that have multiple correct answers. It's useful to remember specific examples to understand these concepts better.

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What is a data type?

It tells the computer what kind of data a value holds and what you can do with it.

Name five common data types used in GCSE programming.

Integer, real (float), Boolean, character, and string.

What is an integer?

A whole number with no decimal part, like 7 or -12.

What is a real (float)?

A number that can have a decimal part, like 3.14 or -0.5.

What is a Boolean?

A value that is either true or false.

What is a character?

A single letter, digit, or symbol, like A, 7, or ?.

What is a string?

Text made of one or more characters, like Hello or AB12 3CD.

What is the difference between a character and a string?

A character holds one symbol; a string holds a sequence of symbols.

Which data type should you use for temperature in degrees Celsius?

A real (float), because it may need decimals.

Which data type should you use for a UK postcode like AB12 3CD?

A string, because it is text, not a number you calculate with.

What does casting mean in programming?

Changing a value from one data type to another on purpose.

Why is choosing the correct data type important?

It helps the program work as expected and use memory well.