In this program, You will learn how to find the largest and smallest digit of a number using a function in Python.

`1234 => 4 1`

## Example: How to find the largest and smallest digit of a number using a function in Python.

```
def largest(n):
digit = 0
while n > 0:
r = n % 10
if digit < r:
digit = r
n = int(n / 10)
return digit
def smallest(n):
digit = 9
while n > 0:
r = n % 10
if digit > r:
digit = r
n = int(n / 10)
return digit
x = int(input("Enter a number:"))
result = largest(x)
print("Largest digit is:", result)
result = smallest(x)
print("Smallest digit is:", result)
```

#### Output:

```
Enter a number:3245
Largest digit is: 5
Smallest digit is: 2
```