objective c - Whats different between two values -

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this question has answer here:

what's different between:

cgfloat gray[4] = {0.9f, 0.9f, 0.9f, 1.0f};

and 

cgfloat gray[4] = {0.9, 0.9, 0.9, 1.0};

?

i think same don't know sure.

i believe indicating number float (i.e. single-precision floating point) opposed double (double-precision floating point),


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