Python Program to Find Largest Among Three Numbers

In this Python example, we will discuss how can we find the largest or the maximum number among the given three numbers. Let’s begin

1. How to find the Largest number?

When the user provides different numbers, then we need to calculate the largest number among all the numbers using different possible ways like using inbuilt functions, if-else ladder etc.

Example:
Input :  3, 4, 6
Output : Largest Number is 6

Input : 9, 5, 1
Output : Largest Number is 9

Some of the topics which will be helpful for understanding the program implementation better are:

• Operators in Python
• Python I/O
• If-Else in Python
• Function in Python

2. Finding The Largest Number Using In-Built Function

In Python, there is an inbuilt function max(), which can easily return us the maximum value from the list of values we pass as parameters to it.

Let’s implement the code and see how it works.

#Python Program to find the largest number using max() function
n1 = int(input("Enter the first number: "))
n2 = int(input("Enter the second number: "))
n3 = int(input("Enter the third number: "))

# We can also take the input in one line 
# n1, n2, n3 = input("Enter three numbers: ").split()
print(max(n1, n2, n3), "is the largest among all the three numbers")

Output
Enter the first number: 32
Enter the second number: 12
Enter the third number: 98
98 is the largest among all the three numbers

3. Finding The Largest Number Using Simple If Else Condition

In this method, we manually compare each of the numbers from the other numbers to find the maximum or the largest among them.

Let’s implement and find out the working of the code.

# Python Program to find the largest number Number using simple if else condition
def max_of_all(n1, n2, n3):
  if n1 >= n2 and n1 >= n3:
    largest = n1
  elif n2 >= n1 and n2 >= n3:
    largest = n2
  else:
    largest = n3

  return (largest, "is the the largest among all the three numbers")


n1 = int(input("Enter the first number: "))
n2 = int(input("Enter the second number: "))
n3 = int(input("Enter the third number: "))

print(max_of_all(n1, n2, n3))

Output
Enter the first number: 32
Enter the second number: 12
Enter the third number: 98
98 is the largest among all the three numbers

In this method, we have simply used if else condition and user-defined function.

In the above program,

• if n1 is greater than both n2 and n3 then it will be printed as largest
• else if n2 is greater than both n1 and n3 then n2 will be printed as largest
• else n3 will be the only largest number left.

4. Conclusion

In this article, we have learned how can we find the maximum or the largest number among the given three numbers using the max in-build function and simply using if else condition.

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Complete code samples are present on Github project.

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