Converting float to string is among the most common tasks of any programmer. Still, if you are new to Arduino, there is a high chance you don’t know how to perform this task. With this detailed tutorial, let’s learn how to convert a float to a string in Arduino.

We will introduce you to two methods of converting, using the function String() and using the function concat(). These programming conversion methods are highly useful for making it simpler for users and developers to see the necessary data.

What Are Float And String In Arduino?

A float is among the most crucial data types in Arduino due to its ability to store decimal numbers. This data type corresponds to floating-point numbers, which are decimal values. These numbers are frequently employed to approximate analog and continuous quantities as they offer more resolution than integers.

Meanwhile, a string in Arduino is employed for text or user input storage. For instance, a text on an LCD or an array of characters typed on a keypad. Strings come in two types:

• Character array, which is equivalent to the string of C programming language.
• Arduino string, which allows users to utilize the string object in the sketch.

Convert A Float To A String In Arduino Utilizing String()

Two parameters must be passed into the String() function in order for it to convert float into a string. The float’s value you want to convert comes first, followed by the decimal place number in the number float.

Use the below sample as a reference.

void loop{
    String stringOne = String(5.698, 3);// using a float and the decimal places
}

Here, 3 is the decimal place number, while 5.698 is the value of the float. Notice that these values are modifiable in accordance with the provided number float.

Convert A Float To A String In Arduino Utilizing Concat()

You need to define the empty string and pass the number float as an argument in the function concat() in order to convert float to string utilizing concat(). The parameter is added to the string using this approach.

Check the following example.

void loop(){
    float parameter = 123.123; // floating number
    String myStringe = "";     // empty string
    myString.concat(parameter);
}

In the case above, an argument is a float type value while myString is a String type variable. This concat() feature also gives back a Boolean value. If the process is successful, it returns true; otherwise, it returns false.

The Bottom Line

So there you have two different ways to convert a float to a string in Arduino. Both are quite straightforward to execute; you can give both of them a try to see which one suits your best.As mentioned before, converting float to string is a common task in any programming language. If you want to learn how to do so in C++, check out this complete tutorial now.