Reverse negativeNum

def reverseNum(n): #user-defined function
   n = str(n)
   if n[0] == '-':
      a = n[::-1]
      return f"{n[0]}{a[:-1]}"
   else:
      return n[::-1]
# take inputs
num = input("inter a negative number:")
# calling function and display result
print('The reverse number is =', reverseNum(num))