## Chapter 4 — if/else

### You’ve seen something just about the same as this before

- Could you be sure what language the above code is from?

### How about this?

### Comparison operators

< | Is the number on the left less than the number on the right? |

> | Is the number on the left greater than the number on the right? |

<= | Is the number on the left less than or equal to the number on the right? |

>= | Is the number on the left greater than or equal to the number on the right? |

== | Are they equal? |

!= | Are they not equal? |

- What’s the same as other languages you’ve learned?
- What’s different from other languages you’ve learned?

### Logical operators

&& | Logical AND — true if and only if both are true |

|| | Logical OR — false if and only if both are false |

! | Logical NOT — true becomes false, false becomes true |

### Boolean variables

- Add this to code that uses
`BOOL`

- Use of
`BOOL`

### else if

- This should look familar

### For the More Curious: Conditional (ternary) operator

- What does this do?