Home - News ( United States | United Kingdom | Italy | Germany ) - Football scores

Showing content from https://www.tutorialspoint.com/python/python-float-function.htm below:

Python float() Function

The Python float() function is used to convert the given value into a a floating-point number. A floating-point number is a numerical type that represents real numbers with decimal points. It can convert various types of data, such as numeric strings or integer numbers, into float.

Note that the provided string should represent a valid numeric value; otherwise, a ValueError will be raised.

Following is the syntax of Python float() function −

float(x)

This function accepts a numerical value or a string containing a numerical representation as its parameter.

This function returns a float object.

Following is an example of the Python float() function. Here, we are converting the integer "42" to a floating-point number −

num = 42
float_num = float(num)
print('The float value obtained is:',float_num)

Following is the output of the above code −

The float value obtained is: 42.0

Here, we are converting the string "3.14" to a float, resulting in the floating-point number 3.14 −

str_num = "3.14"
float_num = float(str_num)
print('The float value obtained is:',float_num)

Output of the above code is as follows −

The float value obtained is: 3.14

Now, we are using the float() function to convert the result of a mathematical expression into a floating-point number. Here, the result of the expression "10 / 3" is converted to a float −

num1 = 10
num2 = 3
expression_result = float(num1 / num2)
print('The float value obtained is:',expression_result)

The result obtained is as shown below −

The float value obtained is: 3.3333333333333335

If you pass a string containing non-numeric characters to the float() function, it will raise a ValueError.

Here, we are converting the string "25 bananas" into a float −

# Example with Error
mixed_string = "25 bananas"
number_part = float(mixed_string)
print(number_part)

We can see in the output below that an issue arises because the string contains non-numeric characters (' apples'), causing a ValueError during the conversion −

Traceback (most recent call last):
  File "C:\Users\Lenovo\Desktop\untitled.py", line 3, in <module>
    number_part = float(mixed_string)
ValueError: could not convert string to float: '25 bananas'

Now, we handle a string containing both numeric and non-numeric characters.

First, we extract only the numeric characters from the "mixed_string." We create the "numeric_part" variable using a list comprehension that filters out non-numeric characters, resulting in a string with only digits "25". Finally, we use the float() function to convert this string into a floating-point number −

# Example without Error
mixed_string = "25 bananas"
numeric_part = ''.join(char for char in mixed_string if char.isdigit())
number_part = int(numeric_part)
print('The integer value obtained is:',number_part)

The result produced is as follows −

The float value obtained is: 25.0

python_type_casting.htm

RetroSearch is an open source project built by @garambo | Open a GitHub Issue

Search and Browse the WWW like it's 1997 | Search results from DuckDuckGo

HTML: 3.2 | Encoding: UTF-8 | Version: 0.7.4