Boolean expressions are statements that evaluate to either TRUE or FALSE. They are used in programming to make decisions, validate conditions, and control the flow of a program. Boolean expressions typically involve:
1. Comparison operators (e.g., ==, !=, >, <, >=, <=)
2. Logical operators (e.g., AND, OR, NOT)
3. Boolean values (TRUE or FALSE)
4. Variables or expressions that evaluate to Boolean values
Examples of Boolean expressions:
- x > 5 (TRUE if x is greater than 5, FALSE otherwise)
- name == “John” (TRUE if the name is “John”, FALSE otherwise)
- is Admin AND has Permission (TRUE if both conditions are TRUE, FALSE otherwise)
- NOT is Raining (TRUE if it’s not raining, FALSE if it is)
To identify Boolean expressions, look for:
- Comparison operators
- Logical operators
- Boolean values (TRUE or FALSE)
- Variables or expressions that evaluate to Boolean values
- Statements that ask a question or make a claim that can be true or false
In programming, Boolean expressions are often used in:
- Conditional statements (if-else statements)
- Loops (while loops, for loops)
- Functions and procedures
- Logical operations and data validation
In Scratch, Boolean expressions are used in blocks like:
- “If [condition] then [action]”
- “Wait until [condition]”
- “Repeat until [condition]”
By using Boolean expressions, you can create more dynamic and interactive programs that make decisions and respond to different conditions!