# Write a Python function to find the max of three numbers | Example code

You have to use if-elif to write a Python function to find the max of three numbers. You can create a Python function to find the maximum of three numbers like this:

``````def find_max_of_three(num1, num2, num3):
# Use the max() function to find the maximum of the three numbers
max_num = max(num1, num2, num3)
return max_num

# Example usage:
num1 = 10
num2 = 5
num3 = 20
maximum = find_max_of_three(num1, num2, num3)
print("The maximum of the three numbers is:", maximum)
``````

In this code, we define a function `find_max_of_three` that takes three parameters (`num1`, `num2`, and `num3`). Inside the function, we use the `max()` function to find the maximum value among the three input numbers and then return that maximum value.

## Python function to find the max of three numbers

A simple example code finds the largest number among the three numbers.

``````def maximum(a, b, c):
if (a >= b) and (a >= c):
largest = a

elif (b >= a) and (b >= c):
largest = b
else:
largest = c

return largest

res = maximum(2, 4, 7)
print("Largest Number: ", res)
``````

Output:

Another example using 2 function

``````def max_of_two(x, y):
if x > y:
return x
return y

def max_of_three(x, y, z):
return max_of_two(x, max_of_two(y, z))

print(max_of_three(3, 6, -5))
``````

Output: 6

User input numbers

``````n1 = int(input("Enter first number: "));

n2 = int(input("Enter second number: "));

n3 = int(input("Enter Third number: "));

def f_max():
if (n1 >= n2) and (n1 >= n3):
l = n1

elif (n2 >= n1) and (n2 >= n3):
l = n2
else:
l = n3
print("A Largest number among the three is", l)

f_max()
``````

Output:

Enter first number: 5
Enter second number: 15
Enter Third number: 10
A largest number among the three is 15

Do comment if you have any doubts or suggestions on this Python basic program.

Note: IDE: PyCharm 2021.3.3 (Community Edition)

Windows 10

Python 3.10.1

All Python Examples are in Python 3, so Maybe its different from python 2 or upgraded versions.