What are these called in Objective C? @"%@" @"%d" @"%i"
What are these called in Objective C? @%@ @%d @%i
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They are called format specifiers, could also be called ‘placeholders in a string for the variables that will follow’.
https://developer.apple.com/library/mac/#documentation/Cocoa/Conceptual/Strings/Articles/formatSpecifiers.html