How to Use Map() Function in Arduino?

The map() function takes one argument, which must be a pointer to an array of floats or integers (or pointers to such). It tells the Arduino board to convert this value into digital form and then seek out that base 10 integer value wherever it is. 

map arduino

By Duco Defiant DogfishDuco Defiant Dogfish on May 18, 2020 
Syntax
map(value, fromLow, fromHigh, toLow, toHigh)

Parameters
value: the number to map.
fromLow: the lower bound of the value’s current range.
fromHigh: the upper bound of the value’s current range.
toLow: the lower bound of the value’s target range.
toHigh: the upper bound of the value’s target range.
  
Example:
map(val, 0, 255, 0, 1023);

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arduino map function

By Enchanting EagleEnchanting Eagle on May 03, 2021 
long map(long x, long in_min, long in_max, long out_min, long out_max)
 {
  return (x - in_min) * (out_max - out_min) / (in_max - in_min) + out_min;
}

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0

This function is useful if you plan on using a big array of values in your program, where each value represents a subset of an alphabet.

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