Flow Control

If Statement

• The expression in an if-statement must evaluate to a boolean expression.
• The else part is optional for an if-statement.
• The else belongs to the closest preceding if that doesn't have an else. Example:

if(a > b) System.out.println("a > b");
if(a > 1) System.out.println("a > 1");
else System.out.println("a < 1");

//The else belongs to if(a>1)

Switch Statement

• General form:

switch(expression) {

      case constant1: code block
      case constant2: code block
      default: code block

}