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.. highlight:: cpp
.. _lang-float:
``float``
=========
Single-precision floating point number. Occupies 4 bytes. On Maple,
the ``float`` type has a range of approximately -3.40282×10^38 to
3.40282×10^38; the ``float`` type is subject to the same
:ref:`overflow issues <lang-variables-rollover>` as any numeric data
type.
``float``\ s have only 6-7 decimal digits of precision. That means the
total number of digits, not the number to the right of the decimal
point. You can get more precision by using a :ref:`double
<lang-double>` (which has a precision of about 16 decimal digits).
The following example declares a ``float`` value named ``myfloat``::
float myfloat;
This example declares a ``float`` value named ``sensorCalibrate``,
with value 1.117::
float sensorCalibrate = 1.117;
The general syntax for declaring a float named ``var`` with value
``val`` is::
float var = val;
Here is a more extended example involving a :ref:`float cast
<lang-floatcast>`::
int x;
int y;
float z;
x = 1;
y = x / 2; // y now contains 0, ints can't hold fractions
z = float(x) / 2; // z now contains .5
See Also
--------
- :ref:`double <lang-double>`
- :ref:`Variables <lang-variables>`
.. include:: /arduino-cc-attribution.txt
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