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Year 10 - Computing

Logical operators

Programming: selection

Unit Summary

In this unit pupils will explore the benefits of good programing practices and why subroutines are used in programs. They will create conditions in programs which use arithmetic, relational and logical expressions. They will develop their understanding of selection and explore nested selection.

Lesson Summary

You will learn to use logical operators to build more complex selection statements.

Key Notes

  • Logical operators are often used when you need to evaluate multiple relational expressions to return a single value.
  • Logical expressions return as either True or False. The three basic logical operators are and, or, and not.
  • Logical expressions can be used in selection statements.

Vocabulary To Learn

  • logical expression: an expression that combines relational and logical operators
  • selection: used when there is more than one possible path for a program to follow

Common Mistakes To Avoid

  • A logical expression can only check one value.

3 Quick Questions (With Answers)

1. Describe the system or process from this lesson in clear steps.

Logical operators are often used when you need to evaluate multiple relational expressions to return a single value. Logical expressions return as either True or False. The three basic logical operators are and, or, and not.

2. Define this computing term and give one practical example. 'logical expression'

an expression that combines relational and logical operators. Add one real device or system example to prove understanding.

3. Correct this common computing misconception.

Mistake: A logical expression can only check one value. Correction: Logical expressions can combine relational and logical operators to check multiple values or inputs.

More Lessons In This Unit

Browse all guides in the Year 10 Computing guide library.