Constrains a number to be within a range.
x: the number to constrain, all data types
a: the lower end of the range, all data types
b: the upper end of the range, all data types
x: if x is between a and b
a: if x is less than a
b: if x is greater than b
sensVal = constrain(sensVal, 10, 150); // limits range of sensor values to between 10 and 150
Corrections, suggestions, and new documentation should be posted to the Forum.
This reference is licensed under a Creative Commons Attribution-ShareAlike 3.0 License and is based on the Arduino reference. Code samples in the reference are released into the public domain.