If Statements checkpoint

_notes

  -In Ruby, the last evaluated line of a method is returned from the method by default.
  -Also note that we must always use end to close an if statement.
  - Note that elsif is not what you might think (from JS) "else if"  - remember the syntax!
  -One Line Conditionals
     -You can also use if and unless at the end of one line statements:
     ```
      gets_discount = true
      price *= 0.8 if gets_discount
      skip_tax = true
      price += price * 0.1 unless skip_tax
      ```
    -If gets_discount is true (which it is) then you'll discount the price by 20%. Unless skip_tax is true, you'll add a 10% tag to the price.
  
  MICHAL - thx for the tip - I finally got it - I was thinking that I had to run the RSpect test inside the interpreter.  Guess not.  Thx!

_Output

 ``` Bloc output - if statements
 ```
 
 ```
 favorite_number should return 'Too low' if the guess is low
 favorite_number should return 'Too high' if the guess is high
 favorite_number should return 'You got it!' if the guess is right
 ```
  ``` Bloc output - and/or
 ```
 lock should return unlocked for 3258
 lock should return locked for 1111
 lock should return unlocked for other valid combinations
 can_i_get? returns true if user wants a computer and has $1,000
 can_i_get? returns false for a comptuer if they don't have $1,000
 can_i_get? returns true for a iPad if they have $500
 can_i_get? returns false for a iPad if they have less than $500
 
 

If Statements Checkpoint

#IF STATEMENTS

def favorite_number(fav, guess)
  if guess < fav
    "Too low"
  elsif guess > fav
    "Too high"
  else 
    "You got it!"
    end
    
end

describe "favorite_number" do
  it "should return 'Too low' if the guess is low" do
    favorite_number(10, 1).should eq("Too low")
  end
  it "should return 'Too high' if the guess is high" do
    favorite_number(5, 11).should eq("Too high")
  end
  it "should return 'You got it!' if the guess is right" do
    favorite_number(11, 11).should eq("You got it!")
  end
end

# AND / OR
def lock(a,b,c,d)
  if (a==3 || a ==5 || a==7) && (b==2) & (c==5 || c==6) && (d==8 || d==9 || d==0)
    "unlocked"
  else
    "locked"
  end       
end

def can_i_get?(item, money)
  if (item == "computer"  && money >= 1_000)
    true
  elsif (item == "computer" && money < 1_000)
    false
  elsif (item == "ipad"  && money >= 500)
    true
  else 
    false
  end
end