CODEWITHSUNDEEP
iosobjective-cmacoscocoa-touchcocoa
user2005643
user2005643

Reputation:

If I want to cast integer types to floating point numbers, should I use float, CGFloat or double?

It's probably not very consequential, but I want to make sure I'm doing this right.

Say I have a long long or an int, if I want to do NSLog(@"%f", theirQuotient), should I cast each number a float, or a CGFloat or a double?

Upvotes: 0

Views: 68

Answers (1)

CRD
CRD

Reputation: 53000

All your choices are valid and which floating point type you use in general depends on your needs.

However in your particular example, passing the value as an argument to a variadic function (NSLog) then choose double - in (Objective-)C float values are promoted to double when passed as one of a variadic function additional parameters so you might as well pass a double.

To understand more look up arithmetic conversions and promotions in C - this is basic stuff you should understand if doing any arithmetic.

Upvotes: 1

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