Produce a value of 1 or 0

Map Branches

• Definition
  • anything with value is an expression
    • Exception
      • (void)0 has no value so anything (void)0 is not an expression
• Compound Expressions
  • a combination of expressions
    • myInt = 7; if ( (myInt >= 1) && (myInt <= 10) )
• Safe Expressions
  • Use: 0 == myInt Don't Use: myInt == 0
    • ensures a missing "=" in == is picked up by compiler
• Examples
  • variables including uninitialized variables
  • Assignment Statements
  • Statements evaluating operators
  • Comparative Operators
    • Compare left and right side of expressions
      • Produce a value of 1 or 0
        • myExample = 9; if ( myExample == 10 )
  • Logical Operators
    • constants true and false
      • also equate to 1 and 0
        • myExample = false; if ( myExample )
        • myExample = false; if ( ! myExample )
        • myExample1 = false; myExample2 = false; if ( myExample1 && myExample2 )
        • myExample1 = false; myExample2 = true; if ( myExample1 || myExample2 )

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