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diff --git a/source/lang/float.rst b/source/lang/float.rst new file mode 100644 index 0000000..ef1a339 --- /dev/null +++ b/source/lang/float.rst @@ -0,0 +1,53 @@ +.. highlight:: cpp + +.. _lang-float: + +float +===== + +Description +----------- + +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:: cc-attribution.txt |