Whats different between two values

Question

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 they are the same but I don't know for sure.

http://stackoverflow.com/questions/10477463/in-c-and-objective-c-should-we-use-0-5f-or-0-5/10477492#10477492 — Parag Bafna, Jun 05 '12 at 18:13
The constant 0.9 declares a double in Objective-C, putting an f on the end - 0.9f declares the constant as a float. — Parag Bafna, Jun 05 '12 at 18:14

score 4 · Accepted Answer · answered Jun 05 '12 at 15:30

4

I believe it is indicating that the number is a float (i.e. single-precision floating point) as opposed to a double (double-precision floating point),

answered Jun 05 '12 at 15:30

Vipul

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so, when i use second case i use double-precision floating point? – Tomasz Szulc Jun 05 '12 at 15:41
It depends on your own preference and usage in your coding. – Cherry_thia Jun 22 '16 at 02:33

Whats different between two values

1 Answers1