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arduino:math:min

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arduino:math:min [2013/02/15 20:45] (current)
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 +======min(x, y)   ======
 +
 +====Description   ====
 +
 +Calculates the minimum of two numbers.
 +
 +====Parameters   ====
 +
 +x: the first number, any data type
 +
 +y: the second number, any data type
 +
 +====Returns   ====
 +
 +The smaller of the two numbers.
 +
 +====Examples   ====
 +<code arduino>sensVal = min(sensVal, 100); // assigns sensVal to the smaller of sensVal or 100
 +                             // ensuring that it never gets above 100.</code>
 +====Note   ====
 +Perhaps counter-intuitively, max() is often used to constrain the lower end of a variable's range, while min() is used to constrain the upper end of the range.
 +
 +
 +====Warning   ====
 +Because of the way the min() function is implemented, avoid using other functions inside the brackets, it may lead to incorrect results
 +
 +<code arduino>
 +min(a++, 100);   // avoid this - yields incorrect results
 +
 +a++;
 +min(a, 100);    // use this instead - keep other math outside the function
 +</code>
 +
 +
 +
 +====See also   ====
 +
 +* [[arduino:math:Max]]
 +* [[arduino:variable scope and qualifiers:Constrain]]
 +
 +
 +
 +Source: arduino.cc
  
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arduino/math/min.txt · Last modified: 2013/02/15 20:45 (external edit)

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