Operators | Computing | Quizalize & Oak National Academy

Starter quiz

Which block is used to carry out selection in Scratch?
- if block ✓
- forever block
- say block
- repeat block
What can the result of an expression be?
- True or False ✓
- Yes or No
- 0 or 1
Which operator block would you use to check if the value of the score variable is 10?
Which of these blocks would you use if you want an operation to happen if the expression evaluates as False?
In which block category can you find the if block?
- Control ✓
- Events
- Variables
- Operators
In which block category can you find this block?
- Operators ✓
- Control
- Events
- Variables

Exit quiz

A ______ operator is used to compare one value to another.
- 'comparison' ✓
The logical expression 'AND' returns True when...
- both values are True. ✓
- one or both values are True.
- the value is False.
The logical expression 'OR' returns True when...
- one or both values are True. ✓
- only one value is True.
- the value is False.
Logical operators and comparison operators can be combined to build complex ______.
- 'conditions' ✓

Worksheet

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Lesson Details

Key learning points

Comparison operators can be used to compare values in expressions.
Logical operators can be used to compare multiple comparison expressions.
Selection statements can combine comparison and logical operators to build complex conditions.

Common misconception

Selection statements can only check one condition at a time.

Complex conditions can be built into selection using a combination of comparison and logical operators. Logical operators join separate conditions and provide one complete statement that still evaluates to only True or False.

Keywords

Comparison operator - an operator that is used to compare one value to another
Condition - used to control the path a program follows
Logic operator - an operator used in a logical expression, for example, AND, OR and NOT