Syntax and Style Bug Hunting: Piecewise Edition

fun piecewisefun(n):
 if (n > 0): n
 else: 0

fun cost(topping):
 if string-equal(topping,
"pepperoni"): 10.50
 else string-equal(topping,
"cheese"): 9.00
 else string-equal(topping,
"chicken"): 11.25
 else string-equal(topping,
"broccoli"): 10.25
 else: "That's not on the menu!"
 end
end

fun absolute-value(a b):
 if a > b: a - b
 b - a
 end
end

fun best-function(f):
 if string-equal(f, “blue”):
 “you win!”
 else if string-equal(f, “blue”):
 “you lose!”
 else if string-equal(f, “red”):
 “Try again!”
 else: “Invalid entry!”
 end
end