Write a python function to find the last digit of a given number.
def last_Digit(n) :
    return (n % 10) 
<s>[INST]<<SYS>>Given a task and its code, generate test cases for the code.<</SYS>>Write a python function to find the last digit of a given number.
def last_Digit(n) :
    return (n % 10) [/INST]assert last_Digit(123) == 3
assert last_Digit(25) == 5
assert last_Digit(30) == 0</s>