[stefan_kendall]

I use the same thing to construct NSDecimalNumber instances. N(100.5) instead of [NSDecimalNumber decimalNumberFromString:@"100.5"]

SO handy.

[bennyg]

You can do this now @(100.5) for NSNumber literals.

[dennis_vartan]

And even shorter, just @100.5 if what you have is a literal. The parentheses are needed if you're boxing a value, e.g.: @(price + 100.5)

In detail: http://clang.llvm.org/docs/ObjectiveCLiterals.html