def is_pos(n):
  return n > 0
  
def is_pos_if(n):
  if n > 0:
    return "True"
  else:
    return "False"        

def is_pos_no_ret(n):
  n > 0

def sign_text(n):
  if is_pos(n):
    return "positive"
  elif n == 0:
    return "zero"
  else:
    return "negative"
    
print(sign_text(7))
print(sign_text(0))
print(sign_text(-5))

print(is_pos(-5))
print(is_pos_if(-5))
print(is_pos_no_ret(-5))

## TODO:
## 0) run the program and observe the output
## 1) inside sign_text, replace is_pos(n) with is_pos_no_ret(n) and observe what happens
## 2) put is_pos(n) back in and make sure the output seems correct
## 3) replace is_pos(n) with is_pos_if(n) and observe what happens