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Learn how to use the float() function to convert a number or a string into a floating point number in Python. See syntax, parameter values, examples and a try it yourself section.
May 10, 2023 · Learn how to use the float () function in Python to convert numbers or strings to floating-point values. See examples, syntax, exceptions and errors of the float () function.
- What Is A Python Float?
- Creating Floating Point Numbers
- Working with Python Floats
- The Python Float Has Limited Precision
- Converting Floats to Other Data Types
- GeneratedCaptionsTabForHeroSec
a Python float is a numerical data type that represents a floating-point number. A floating-point number is a number with a decimal point or exponent notation, indicating that a number is a certain number of digits before and after the decimal point or exponent. For example, the number 1.23 is a floating-point number with one digit before the decim...
There are multiple ways to create floating-point numbers in Python. Most of the time, you will simply enter the number as-is: But you may want to convert a number or a string to a float using the float() function. The variable f will become 2.0 in all cases below: You can also use scientific notation:
Working with floats is not much different from working with integers. You can do the usual addition, subtraction, multiplication, and division.
Let’s do a little experiment. For extra dramatic effect, try this for yourself first: Did you expect the output to be 0.3 like any normal person would? I don’t blame you, but you’re wrong! The output is actually 0.30000000000000004. As absurd as this might seem, there’s an explanation. First of all, some fractional numbers are endless. E.g., when y...
You can convert a float to other data types, such as int or str, using the built-in functions int() and str(). For example, the following code converts the float 1.23to an integer and a string:
Learn what floats are, how to create and manipulate them, and why they have limited precision in Python. Find out how to use the decimal module, NumPy, and rounding functions to improve your calculations.
The float() method returns a floating point number from a number or a string. Example. int_number = 25. # convert int to float . float_number = float(int_number) print(float_number) # Output: 25.0. Run Code. float () Syntax. The syntax for float() is: float([x]) float () Parameters. The float() method takes a single parameter:
- Truth Value Testing¶ Any object can be tested for truth value, for use in an if or while condition or as operand of the Boolean operations below. By default, an object is considered true unless its class defines either a __bool__() method that returns False or a __len__() method that returns zero, when called with the object.
- Boolean Operations — and, or, not¶ These are the Boolean operations, ordered by ascending priority: Operation. Result. Notes. x or y. if x is true, then x, else y.
- Comparisons¶ There are eight comparison operations in Python. They all have the same priority (which is higher than that of the Boolean operations). Comparisons can be chained arbitrarily; for example, x < y <= z is equivalent to x < y and y <= z, except that y is evaluated only once (but in both cases z is not evaluated at all when x < y is found to be false).
- Numeric Types — int, float, complex¶ There are three distinct numeric types: integers, floating point numbers, and complex numbers. In addition, Booleans are a subtype of integers.
Learn how to use Python float() to convert a string, an integer, or an object to a floating point number. See the syntax, the output, and the exceptions of the float() function.
In this tutorial, you'll learn about the Python float type, how Python represents the floating-point numbers, and how to test the floating-point number for equality.
