402: Highlights

• If you want to execute a statement only when a Boolean expression produces true, then use an if statement:

  if (Boolean expression) statement 
  

• If you want to execute one statement when an expression evaluates to true, and another when the expression evaluates to false, then use an if–else statement:

  if (Boolean expression)  
    if-true statement 
  else 
    if-false statement 
  

• If you want to execute a group of statements in an if or if–else statement, then use braces to combine those statements into a single block.
• If you want to use nested if–else statements, then use braces to clarify your grouping intention.
• If you want the value of an expression to be the value of one of two embedded expressions, and you want the choice to be determined by the value of a Boolean expression, then instantiate the following pattern:

  Boolean expression 
   ? if-true expression : if-false expression