Write a Python program to find the largest of three numbers using Elif Statement and Nested If. There are many approaches to finding the largest number among the three numbers, and we discuss all of them.
Python Program to find Largest of Three numbers using elif Statement
This program helps the user to enter three different values. Next, this program will find the largest among those three numbers using the elif Statement
# using elIf Statement
a = float(input("Please Enter the First value: "))
b = float(input("Please Enter the First value: "))
c = float(input("Please Enter the First value: "))
if (a > b and a > c):
print("{0} is Greater Than both {1} and {2}". format(a, b, c))
elif (b > a and b > c):
print("{0} is Greater Than both {1} and {2}". format(b, a, c))
elif (c > a and c > b):
print("{0} is Greater Than both {1} and {2}". format(c, a, b))
else:
print("Either any two values or all the three values are equal")
First, we entered values a = 12, b = 4, and c = 6. Next, we entered values a = 19, b = 25, and c = 20. Next, we entered values a = 45, b = 36, and c = 96. Finally, we entered the values a = 5, b = 5, c= 5.
The output of the above Program to Find the Largest of Three Numbers examples is as follows.
In this Python Program to Find the Largest, the first three lines of code ask the user to enter three numbers and store the user entered values in variables a, b, and c
Within this Python program, the First if condition checks whether a is greater than b and a is greater than c. If both of these are True, the following print statement will be displayed (a is greater than both b, c).
if (a > b and a > c):
print("{0} is Greater Than both {1} and {2}". format(a, b, c))
The first Python elif Statement statement checks whether b is greater than a and b is greater than c. If both are True, the following print statement will be displayed ( b is greater than both a, c).
elif (b > a and b > c):
print("{0} is Greater Than both {1} and {2}". format(b, a, c))
The second Elif statement checks whether c is greater than a and c is greater than b. If both are True, the following print statement will be displayed ( c is greater than both a, b).
elif (c>a and c>b):
print("{0} is Greater Than both {1} and {2}". format(c, a, b))
If all the above Python conditions fail, it means they are equal.
print("Either any two values or all the three values are equal")
Python Program to Find Largest of Three Numbers using Nested If Statement
This program helps the user to enter three different values. Next, this program will find the largest number among those three using the Nested If statement.
# using Nested If Statement
a = float(input("Please Enter the First value: "))
b = float(input("Please Enter the First value: "))
c = float(input("Please Enter the First value: "))
if (a-b > 0) and (a-c > 0):
print("{0} is Greater Than both {1} and {2}". format(a, b, c))
else:
if(b - c > 0):
print("{0} is Greater Than both {1} and {2}". format(b, a, c))
else:
print("{0} is Greater Than both {1} and {2}". format(c, a, b))
Within this Program to Find the Largest of Three Numbers, First, we entered the values a= 32, b= 45, c= 98. Next, we entered the values a= 22, b= 5, c= 7. And finally, we entered the values a= 56, b= 222, c= 98
Within this Python Program to Find the Largest, the first three statements ask the user to enter three numbers and store the user entered values in variables a, b, and c
The First if condition checks whether a-b is greater than 0 and a-c is greater than 0. This condition fails if we subtract a small number from a big one. Otherwise, it will be True. If this condition is True, then a is greater than both b and c.
if (a-b> 0) and (a-c > 0):
print("{0} is Greater Than both {1} and {2}". format(a, b, c))
Else statement will execute when the first If condition is False, so there is no need to check for a value. In the Else statement, we insert one more if condition (Python Nested If) to check whether b-c is greater than 0. If this condition is True, then b is greater than both a and c.
else:
if(b- c> 0):
print("{0} is Greater Than both {1} and {2}". format(b, a, c))
Else c is greater than both a, b.
print("{0} is Greater Than both {1} and {2}". format(c, a, b))
Python Program to find Largest of three numbers using max()
The built-in max() function is a straightforward approach to find the largest of three numbers. Pass the three values as arguments to the max() function, and it returns the largest.
It is very effective approach because we don’t need the if conditions (elif) to check multiple conditions. The Python max function takes care of everything internally, and it returns the result.
a = 10
b = 20
c = 15
print(max(a, b, c))
20Largest among three using a conditional or ternary operator
Using a ternary operator is a complex approach to finding the largest of three numbers. We have to nest conditional operators to check the expression. However, it’s a one-line approach.
a = 55
b = 40
c = 70
l = a if ( a >= b and a >= c ) else (b if b >= c else c)
print(l)
70Largest of 3 numbers using sorted()
It’s completely an indirect approach. First, we have to build a list from the given three numbers because the sorted() function works on objects and returns the same object. Here, we converted the given numbers to a Python list of integers.
Next, we used the Python sorted function with the reverse argument to sort the list in descending order. Next, print the first item from the list.
a = 55
b = 90
c = 70
ls = sorted([a, b, c], reverse=True)
print(ls)
print(ls[0])[90, 70, 55]
90Largest of 3 numbers using a function
Here, we defined a function that accepts three arguments. Next, we use the Python list sort method to sort a list in ascending order. -1 returns the last list item.
def largest(a, b, c):
res = [a, b, c]
res.sort()
return res[-1]
a = 55
b = 90
c = 70
print(largest(a, b, c))
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