float() is a part of the built-in function of the Python Interpreter.
Syntax:class float(x=0.0)
The float() function returns a floating point number from the passed in number or string x.
Example 1: passing a String argument
>>> float('10.5')
10.5
>>> float('-10.5')
-10.5
>>> float('10')
10.0
>>> float('-10')
-10.0
>>> float('a')
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
ValueError: could not convert string to float: 'a'
Documentation: https://docs.python.org/3/library/functions.html#float
![passing a String argument to float function passing a String argument to float function](https://code2care.org/python/float-built-in-function-in-python/images/passing a String argument to float function.jpg)
Example 2: passing exponential values:
>>> float('2e3')
2000.0
>>> float('-2e3')
-2000.0
Example 3: When no argument is passed
When no argument is passed, the value is set as 0.0
>>> float()
0.0
Example 4: NaN and infinity
>>> float('NaN')
nan
>>> float('Infinity')
inf
>>> float('-Infinity')
-inf
Python 3 Code example with float()
Add two float numbers
float1 = float(input("Enter float number 1: "))
float2 = float(input("Enter floart number 2: "))
sum_of_two_numbers = float1 + float2
print(f"Sum of {float1} and {float2} is {sum_of_two_numbers}")
Output:
Enter float number 1: 1.4
Enter float number 2: 2.4
Sum of 1.4 and 2.4 is 3.8
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