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 overflow issues as any numeric data type.
floats 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 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 float cast:
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¶
License and Attribution
This documentation page was adapted from the Arduino Reference Documentation, which is released under a Creative Commons Attribution-ShareAlike 3.0 License.
