![\"MicroPython](\"https:\/\/i0.wp.com\/randomnerdtutorials.com\/wp-content\/uploads\/2026\/02\/Micropython-string-formatting.jpg?resize=1200%2C675&quality=100&strip=all&ssl=1\")
<\/figure><\/div>\n\n\nFor example: concatenate a string with a number, format the number to display only two decimal places, populate a text with different variables, and more.<\/p>\n\n\n\n
Table of Contents:<\/strong><\/p>\n\n\n\n In this tutorial, we’ll cover the following subjects:<\/p>\n\n\n\n MicroPython offers several methods for string formatting, each with its own syntax and features. The most common methods include the % operator<\/strong>, the format()<\/span> method<\/strong>, and f-strings<\/strong> (also called formatted string literals<\/em>). In the following sections, we\u2019ll take a look at each of these methods and provide examples of how to use them.<\/p>\n\n\n\n The %<\/span> operator in MicroPython allows you to perform string formatting by replacing placeholders in a string with corresponding values. For example:<\/p>\n\n\n\n This generates the following output.<\/p>\n\n\n In this example, %s<\/span>, %d<\/span>, and %.1f<\/span> are placeholders for a string, an integer, and a floating-point number, respectively. The values (name, age, height) are substituted into the placeholders in the order they appear.<\/p>\n\n\n\n If you have a variable that is of type float, there are more formatting options. In this case, the %.1f<\/span> syntax is used to specify the precision of the float value. The number after the dot (.<\/span>) represents the number of decimal places to display in the formatted float.<\/p>\n\n\n\n More about this method and conversion types here<\/a>.<\/p>\n\n\n\n The format()<\/span> method provides a more versatile and flexible approach compared to the %<\/span> operator. It allows you to specify placeholders using named indexes {name}<\/span>, numbered indexes {0}<\/span>, or even empty placeholders {}<\/span>. See the example below:<\/p>\n\n\n\n F-strings are relatively recent and provide a concise and readable syntax for string formatting. They allow you to embed expressions directly within string literals automatically. For example:<\/p>\n\n\n\n In this example, {name}<\/span>, {age}<\/span>, and {height:.1f}<\/span> are placeholders for a string, an integer, and a floating-point number with one decimal place, respectively. An f-string is created by adding a string literal with the letter f<\/span> or F<\/span> before the “<\/span>.<\/p>\n\n\n\n When an f-string is evaluated, Python\/MicroPython evaluates the expressions enclosed within curly braces and replaces them with their values. This allows you to include variable values, function calls, and even arithmetic expressions directly within the string.<\/p>\n\n\n\n In this tutorial, we provided you with three different methods for string formatting in MicroPython. Which one is your favorite?<\/p>\n\n\n\n We hope you’ve found this tutorial useful. You can put this into practice in your ESP32, ESP8266, or Raspberry Pi Pico MicroPython projects.<\/p>\n\n\n\n More MicroPython resources:<\/p>\n\n\n\n <\/p>\n","protected":false},"excerpt":{"rendered":" In this quick guide, we’ll explore different string formatting techniques essential for manipulating text in MicroPython. These techniques are useful for tasks such as displaying information to users, logging data, … <\/p>\n\n
MicroPython String Formatting<\/h2>\n\n\n\n
% Operator for String Formatting<\/h2>\n\n\n\n
name = \"Sara\"\nage = 30\n# Format a string with placeholders\nheight = 160.521\nmessage = \"Hello, my name is %s. I am %d years old and I'm %.1f cm tall.\" % (name, age, height)\n\n# Print the formatted message\nprint(message)<\/code><\/pre>\n\n\n\n![\"Micropython](\"https:\/\/i0.wp.com\/randomnerdtutorials.com\/wp-content\/uploads\/2026\/02\/percent-formatting-example-micropython.png?resize=779%2C678&quality=100&strip=all&ssl=1\")
<\/figure><\/div>\n\n\nformat()<\/em> Method for String Formatting<\/h2>\n\n\n\n
# Different types of placeholders\nmessage1 = \"Hello, my name is {name}. I am {age} years old and I'm {height:.2f} cm tall.\".format(name =\"Sara\",age=30, height=160.521 )\n\nmessage2 = \"Hello, my name is {0}. I am {1} years old and I'm {2:.2f} cm tall.\".format(\"Sara\",30, 160.521)\n\nmessage3 = \"Hello, my name is {}. I am {} years old and I'm {:.2f} cm tall.\".format(\"Sara\",30, 160.521)\n\n# Print the formatted message\nprint(message1)\nprint(message2)\nprint(message3)<\/code><\/pre>\n\n\n\nF-strings (Formatted String Literals)<\/h2>\n\n\n\n
name = \"Sara\"\nage = 30\nheight = 160.521\n\n# Format a string with placeholders\nmessage = f\"Hello, my name is {name}. I am {age} years old and I'm {height:.1f} cm tall.\"\n\n# Print the formatted message\nprint(message)<\/code><\/pre>\n\n\n\nWrapping Up<\/h2>\n\n\n\n
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