Unit 3: Boolean Expressions and If Statements

• Block of statements: One or more statements enclosed in an open curly brace '{' and a closing curly brace '}'.
• Boolean Operator ==:

  • equality operator
  • asks a question
  • determines whether the two values are equal
  • returns a truth value
• conditional: Used to execute code only if a Boolean expression is true.
• conditional statement: used when a programmer wants to control the flow of the program
• logical and: Used to only execute the following statement or block of statements if both conditions are true
• logical or: Used to execute the following statement or block of statements if one of the conditions are true
• negation: turns a true statement false and a false statement true
• if (Boolean expression): used to start a conditional statement. This is followed by a statement or a block of statements that will be executed if the Boolean expression is true.
• else: used to execute a statement or block of statements if the Boolean expression on the if part was false.
• Compound Conditional: A conditional with one or more logical operators used to incorporate several logical expressions.
• ! logical not: an operator placed before a boolean statement that returns the negation of the statement's value
• == is equal to: an operator placed btwn two boolean statements that returns true if both statements are equal/have same value and false otherwise
• Blocking: the { and } symbols used in flow control statements that allows the programmer to execute a series of commands when a given condition is satisfied
• truth value of a statement: a statement is either true or false
• Trace Table: A chart used by programmers to keep track of the values of variables in their program.