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0
Assignment establishes the initial value.
Beginner · Other / specialist pathway · Coding
Variables and simple data
Trace a variable as its value changes.
Original Kidemy beginner self-study unit · Learn the idea, try the practical activity and review your written answers. Review your project with a guardian or teacher using the criteria below. Teacher-led course approval and booking are separate.
Learn the idea
A variable is a named place for a value. Assignment gives it a value; a later instruction can update that value. Trace the instructions one at a time and keep a table of the current value. A demonstration score here is practice data and does not change game coins or grades.
Worked example
Set score to 0. Add 3: score is 3. Add 3 again: score is 6. Add −1: score is 5. Each update uses the current value.
- Write the initial value.
- Apply one instruction at a time.
- Record the new value after each update.
Try it step by step
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Your written practice
Show your working on paper and enter your answer here. If it does not match, compare the model and try again.
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6
0 + 3 + 3 = 6.
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5
The updated value is five.
Write in your own words. A guardian or teacher should review this response.
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2 → 6 → 7
Check that each operation uses the updated value.
Write in your own words. A guardian or teacher should review this response.
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Score is the name; 5 is its current value in the example.
Accept a clear distinction between the label and the stored content.
A variable trace table
Make a three-column table: instruction, value before and value after. Trace four number updates.
Review with a guardian or teacher
- Include the initial assignment.
- Use the current value each time.
- Check the final value independently.
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