Nested If Statements

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Nested If Statements

• Computer Science
• Chapter 5

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Nested if Statements

• Nested if statements
• allow you to combine multiple if statements
• allow more complex decision making in your program

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Braces In Nested Statements

• Braces can
• Act as documentation of your intent
• Make code easier to read
• Help you group if else statement as you intended

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Deeply Nested Statements

• Deeply nested statements become very confusing.
• JOptionPane provides an easy way to get input
  from the user
• Use import statement
• Import javax.swing.JOptionPane

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Else If Idiom

• Using the else-if idiom the second if statement
  immediately follows the else statement
• If (choice 1)
• System.out.println(Running..)
• Else if (choice 2 )
• system.out.println(Hopping)

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The Switch Statement

• The switch statement is specifically designed for
  choosing among multiple options.
• Advantages
• Additional cases can be added easily to expand
  number of choices
• Easier to read than nested statements
• Easier to run and maintain

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Ternary Operators

• Ternary Operator is a concise alternative to if
  statement
• Use when you want to assign a value based on a
  test that evaluates to a Boolean value

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Ternary Syntax

• Syntax is
• Variable condition ? expression1 expression2
• Condition tested
• If condition evaluates to true, statement
  evaluates to the first expression
• If condition evaluates to false, statement
  evaluates to the second expression

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Default Choice

• Default tag optional
• Good programming practice to include a default
• Impossible to get to defaultput in an error
  handling code just in case