Example 1: map arduino 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 ) ; Example 2: arduino map function 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 ; }