What are boolean expressions? How can you identify them

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!

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