Python numbers with commas

Python format number with commas

In this Python tutorial, we will discuss the python format number with commas. Also, we will see these below topics as:

• Python format number with commas
• Python add a comma between elements
• Python format number with commas and round to 2 decimal places

Python format number with commas

Let us see how to format number with commas in python.

In Python, to format a number with commas we will use “” along with the format() function and it will add a comma to every thousand places starting from left.

numbers = "".format(5000000) print(numbers)

After writing the above code (python format number with commas), Ones you will print “numbers” then the output will appear as a “ 5,000,000”. Here, .format() will add commas to the number after every thousand places. In this way, we can format the number with commas.

You can refer to the below screenshot for python format number with commas.

Python add a comma between elements

Let us see how to add a comma between elements in Python.

We will use the “”.format() function and it will add a comma between the elements after every thousand places starting from left

def my_value(number): return ("".format(number)) print(my_value(100000000)

After writing the above code (python add a comma between elements), Once you will print “my_value(100000000)” then the output will appear as a “ 100,000,000”. Here, .format(number) will add commas between elements.

You can refer to the below screenshot for python add a comma between elements.

Python format number with commas and round to 2 decimal places

Now, let us see the below example on python format number with commas and round to 2 decimal places.

We will use “<. 2f>”.format()” for float format number with commas as thousands separators. The digits beyond two places after the decimal get ignored.

my_num = 235478.875425 s = "".format(my_num) print(s)

After writing the above code (python format number with commas and round to 2 decimal places), when you will print “s” then the output will appear as “ 235,478.88”. Here, my_num = 235478.875425 is the number in float and we will use <. 2f>.format(my_num) to add commas to the number after every thousand places and it will round to 2 decimal places.

You can refer to the below screenshot for python format number with commas and round to 2 decimal places.

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In this Python tutorial, we have learned about the python format number with commas. Also, We covered these below topics:

• Python format number with commas
• Python add a comma between elements
• Python format number with commas and round to 2 decimal places

I am Bijay Kumar, a Microsoft MVP in SharePoint. Apart from SharePoint, I started working on Python, Machine learning, and artificial intelligence for the last 5 years. During this time I got expertise in various Python libraries also like Tkinter, Pandas, NumPy, Turtle, Django, Matplotlib, Tensorflow, Scipy, Scikit-Learn, etc… for various clients in the United States, Canada, the United Kingdom, Australia, New Zealand, etc. Check out my profile.

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How to print a number using commas as separators?

Python language combines different data types, operators, and functions. Let’s see how to print a number using commas as separators in Python.

We use integer and float data types for various mathematical operations. Python is used in different domains like machine learning and data science, Where mathematical problems are solved using different types of formulas. We use different mathematical formulas on various data types like integers and float.

Why do we need commas as a separator in numbers?

Sometimes, we must deal with big integers and float numbers like 1000000 or 48907.6789. Visualization of these numbers is very complex compared to the smaller numbers, so we always use commas to separate them. Including the commas as a separator in this number helps us visually to recognize the number. For example, 10,00,000 is more understandable as compared to 1000000 this number.

Integer in Python

A simple number without a fractional part or any type of number, including zero, is considered an Integer data type in Python. Integers are used in various mathematical operations. Let’s see the 1 example.

Here, the x variable is assigned with value, and the type() function is used to get the data type of value provided to the variable. The integer data type is represented as an ‘int’ in the output.

Float in Python

A number with a floating or decimal point is considered a float data type in python. For example, 4.5, 7.89, etc.

Here, the X variable is assigned with value, and after printing the type() function, we get the output as a float type.

For more information on data types, please read this article.

Print a Number Using Commas as Separators

Example 1: Print Commas Using F-string Function (Integer Data Type)

The f-string is considered a ‘formatted string’ in python. The syntax of the f-string is very easy; it begins with the f letter and ends with the curly braces. The curly braces contain data that we want to replace the string. Let’s see the example of using an f-string as a commas separator.

Here, the ‘Number’ is assigned with the integer value. An f-string function is used where the variable and comma are provided as attributes of the f-string function.

Example 2: Print Commas Using F-string and Replaces Function (Integer Data Type)

The Replace function is used to replace the values which are mentioned within curly braces. Let’s, use the replace function to add comma at the thousand place in the number.

Number = f''.replace('.' , ',') print(Number)

Here, The f-string and replace functions are both used together. The ‘,’ is inserted in the provided f-string. Let’s see the output.

Example 3: Print commas using format() function (Decimal Data Type)

The format() function is used to format the string in python. In this example, we can use the format function to add the comma at the thousand places. The format function automatically replaces a thousand places with commas. Let’s see the example with decimal number.

Number = 456324.1234567 Result = ''.format(Number) print(Result)

Here, in this example 3, we have used a decimal number as input. The .format() function is used where the ‘Number’ is provided as a parameter.

Example 4: Print commas using format() function (Integer Data Type)

The format() function is also used for the integer data types. Let’s see the implementation using integer data type.

Result = ''.format(3456231) print(Result)

Here, in this example, the result variable contains the value, which is an integer data type. the .format() function holds the integer as its attribute. Let’s see the result for the above code.

Summary

This article gives different examples of methods to print numbers using commas as separators. The numbers are extensively used in different mathematical operations. It is necessary to represent these numbers appropriately. The f-string, format(), and replace() functions can be used to insert the commas in appropriate places. I hope you will enjoy this article.

References

Do read the official documentation for format and replace function.

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Format Number With Commas in Python

1. Use format() Function to Format Number With Commas in Python
2. Use the str.format() Method to Format Number With Commas in Python
3. Use F-Strings to Format Number With Commas in Python

Whenever there are a lot of numbers in one program, inserting commas in between each number as a thousand separators always helps in reading the number correctly without looking at each number carefully. Generally, this task is done when we deal with big numbers with decimal points, currencies, etc.

This tutorial will demonstrate different ways of formatting a number with commas in Python.

Use format() Function to Format Number With Commas in Python

The format() is a built-in function that generally helps in string handling. This function also helps in changing complex variables and handles value formatting.

initial_num = 1000000000  thousand_sep = (format(initial_num, ',d'))  print("Number before inserting commas : " + str(initial_num)) print("Number after inserting commas: " + str(thousand_sep)) 

Number before inserting commas : 1000000000 Number after inserting commas: 1,000,000,000 

In this method, we first store a number in which we have to insert commas in a variable. Then we use the format() function by first mentioning the variable name and then the format specifier as the function argument. Here, the format specifier is ,d , representing that a decimal value is stored as an initial value. Finally, the str() function returns the initial and final value as a string.

Use the str.format() Method to Format Number With Commas in Python

This method works based on the string formatter. String formatters are represented by curly braces <> that work by mentioning the replacement parameters and the place of those parameters.

def thousand_sep(num):  return (" ".format(num))  print(thousand_sep(1000000000)) 

In this method, we first define a function called thousand_sep with its argument as the number in which commas are inserted. After that, we call the str.format() with the string as the string formatter. In the string formatter, we mention the replacement parameter i.e , . Finally, we print the defined function.

Use F-Strings to Format Number With Commas in Python

F-strings is again a string formatting technique in Python. This method is the simplest way to add expressions inside python strings. It is used by prefixing the whole string with the letter f .

initial_num = 1000000000 f'initial_num:,>' 

In this method, the expression to be added and the string to be formatted are stored after prefixing the letter f . Also, note that the output is returned as a string.

Lakshay Kapoor is a final year B.Tech Computer Science student at Amity University Noida. He is familiar with programming languages and their real-world applications (Python/R/C++). Deeply interested in the area of Data Sciences and Machine Learning.

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