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Read input as a float in Python

Python | read/take input as a float: Here, we are going to learn how to read input as a float in Python?
Submitted by IncludeHelp, on April 02, 2019

To take input in Python, we use input() function, it asks for an input from the user and returns a string value, no matter what value you have entered, all values will be considered as strings values.

Consider the following example,

# python code to demonstrate example
# of input() function

val1 = input("Enter any value: ")
print("value of val1: ", val1)
print("type of val1: ", type(val1))

val2 = input("Enter another value: ")
print("value of val2: ", val2)
print("type of val2: ", type(val2))

val3 = input("Enter another value: ")
print("value of val3: ", val3)
print("type of val3: ", type(val3))

Output

Enter any value: 10
value of val1:  10
type of val1:  <class 'str'>
Enter another value: 10.23
value of val2:  10.23
type of val2:  <class 'str'>
Enter another value: Hello
value of val3:  Hello
type of val3:  <class 'str'>

See the program and output – Here, we provided three value "10" for val1 which is an integer value but considered as a string, "10.23" for val2 which is a float value but considered as a string, "Hello" for val3 which is a string value.

How to take input as a float?

There is no such method, that can be used to take input as a float directly – but input string can be converted into a float by using float() function which accepts a string or a number and returns a float value.

Thus, we use input() function to read input and convert it into a float using float() function.

Consider the below example,

# python code to take float input

# reading a value, printing input and it's type
val1 = input("Enter any number: ")
print("value of val1: ", val1)
print("type of val1: ", type(val1))

# reading a value, converting to float
# printing value and it's type
val2 = float(input("Enter any number: "))
print("value of val2: ", val2)
print("type of val2: ", type(val2))

Output

Enter any number: 123.456
value of val1:  123.456
type of val1:  <class 'str'>
Enter any number: 789.123
value of val2:  789.123
type of val2:  <class 'float'>

Example to input two float numbers and find their sum and average

# python code to read two float numbers
# and find their addition, average

num1 = float(input("Enter first number : "))
num2 = float(input("Enter second number: "))

# addition
add = num1 + num2

# average
avg = add/2

print("addition: ", add)
print("average : ", avg)

Output

Enter first number : 123.456
Enter second number: 789.02
addition:  912.476
average :  456.238





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