How do you convert a decimal to a whole number in python?
IntroductionIn Python, data types are used to classify one particular type of data, determining the values that you can assign to the type and the operations you can perform on it. When programming, there are times we need to convert values between types in order to manipulate values in a different way. For example, we may need to concatenate numeric values with strings, or represent decimal places in numbers that were initialized as integer values. Show
This tutorial will guide you through converting numbers, strings, tuples and lists, as well as provide examples to help familiarize yourself with different use cases. PrerequisitesYou should have Python 3 installed and a programming environment set up on your computer or server. If you don’t have a programming environment set up, you can refer to the installation and setup guides for a local programming environment or for a programming environment on your server appropriate for your operating system (Ubuntu, CentOS, Debian, etc.) Converting Number TypesIn Python, there are two number data types: integers and floating-point numbers or floats. Sometimes you are working on someone else’s code and will need to convert an integer to a float or vice versa, or you may find that you have been using an integer when what you really need is a float. Python has built-in methods to allow you to easily convert integers to floats and floats to integers. Converting Integers to FloatsPython’s method Info: To follow along with the example code in this tutorial, open a Python interactive shell on your local system by running the
In this case, You can also use this with a variable. Let’s declare
By using the Converting Floats to IntegersPython also has a built-in function to convert floats to integers: The
In this case, You can also use this with variables. Let’s declare
When converting floats to integers with the Numbers Converted Through DivisionIn Python 3, relevant quotients are converted from integers to floats when doing division though they are not in Python 2. That is, when you divide 5 by 2, in Python 3 you will get a float for an answer (2.5):
In Python 2, since you were dealing with two integers, you would receive an integer back as your answer, instead: Converting with StringsA string is a sequence of one or more characters (letters, numbers, symbols). Strings are a common form of data in computer programs, and we may need to convert strings to numbers or numbers to strings fairly often, especially when we are taking in user-generated data. Converting Numbers to StringsWe can convert numbers to strings through using the Let’s first look at converting integers. To convert the integer
When running
The quotes around the number 12 signify that the number is no longer an integer but is now a string value. With variables we can begin to see how practical it can be to convert integers to strings. Let’s say we want to keep track of a user’s daily programming progress and are inputting how many lines of code they write at a time. We would like to show this feedback to the user and will be printing out string and integer values at the same time:
When we run this code, we receive the following error:
We’re not able to concatenate strings and integers in Python, so we’ll have to convert the variable
Now, when we run the code, we receive the following output that congratulates our user on their progress:
If we are looking to convert a float to a string rather than an integer to a string, we follow the same steps and format. When we pass a float into the
We can test to make sure it’s right by concatenating with a string:
We can be sure our float was properly converted to a string because the concatenation was performed without error. Converting Strings to NumbersStrings can be converted to numbers by using the If your string does not have decimal places, you’ll most likely want to convert it to an integer by using the Let’s use the example of the user Sammy keeping track of lines of code written each day. We may want to manipulate those values with math to provide more interesting feedback for the user, but those values are currently stored in strings:
Because the two numeric values were stored in strings, we received an error. The operand Let’s modify the code to include the
The variable We can also convert the numbers in the example above to float values by using the The user Sammy is earning points in decimal values
In this case, using the We’ll want to convert these strings to floats prior to performing any math with the
Now that we have converted the two strings to floats, we receive the anticipated result that adds If we try to convert a string value with decimal places to an integer, we’ll receive an error:
If we pass a decimal value in a string to the Converting strings to numbers enables us to quickly modify the data type we are working with so that we can perform operations on numeric values that were originally cast as strings. Converting to Tuples and ListsYou can use the methods
Converting to TuplesLet’s start with converting a list to a tuple. Converting a list to a tuple, because it’s an immutable data type, can allow substantial optimization to the programs that we create. When we use the method
We see that a tuple is printed out in the output, as the items are now contained within parentheses rather than square brackets. Let’s use
Again, we see that the list value is changed to a tuple value, indicated by the parentheses. We can convert any iterable type to a tuple, including strings:
Because we can iterate through strings, we can convert them to tuples with the
While it is possible to convert the integer to a string and then convert to a tuple, as in Converting to ListsConverting values, especially tuples, to lists can be useful when you need to have a mutable version of that value. We’ll use the
The square brackets signal that a list has been returned from the original tuple value that was passed through the To make the code more readable, we can remove one of the pairs of parentheses by using a variable:
If we print Just like tuples, strings can be converted to lists:
Here the string ConclusionThis Python tutorial demonstrated how to convert several of the important native data types to other data types, primarily through built-in methods. Being able to convert data types in Python provides you with extra flexibility when writing your programs. How do you convert a decimal to a number in Python?How to convert a string with decimals to an integer in Python. a_string = "1.33". float_str = float(a_string). int_str = int(float_str). print(int_str). How do you convert to whole number in Python?Python has three ways to turn a floating-point value into a whole (integer) number:. The built-in round() function rounds values up and down.. The math. floor() function rounds down to the next full integer.. The math. ceil() function rounds up to the next full integer.. How do you round a decimal to integer in Python?Round() Round() is a built-in function available with python. It will return you a float number that will be rounded to the decimal places which are given as input. If the decimal places to be rounded are not specified, it is considered as 0, and it will round to the nearest integer.
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