I'm looking in the FastLed documentation the range of variability of "uint8_t fadeBy" in

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I’m looking in the FastLed documentation the range of variability of “uint8_t fadeBy” in the function void “fadeToBlackBy (CRGB * LEDs, uint16_t num_leds, uint8_t fadeBy)”.
You know what? Thanks

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0-255 (uint8_t is an 8-bit integer, 8-bit integers can hold values from 0-255) - think of it like a binary percentage, that is 255 is 100%, 128 is 50%, etc…

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…ah right!
Thanks a lot.
Where can I find the index FastLed syntax?

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uint8_t is a c language feature (not specifically related to FastLed). See here: https://en.wikibooks.org/wiki/C_Programming/C_Reference/stdint.h#Exact-width_integer_types

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@Rowan_D
yes…certainly … but I was referring to the use of “fadeToBlackBy” and “fadeBy”. My question was to find out what are the function and its fadeBy.