Types in Objective-C on iOS

Question

I want to ask about the fundamental data types in Objective-C on iOS.

I need the size on which the variable is represented and the range of the variable. So in example: short int - 2 bytes - signed: -32768 to 32767 and unsigned: 0 to 65535 This is only an example.

User · Answer

Note that you can also use the C99 fixed-width types perfectly well in Objective-C:

#import <stdint.h>
...
int32_t x; // guaranteed to be 32 bits on any platform

The wikipedia page has a decent description of what's available in this header if you don't have a copy of the C standard (you should, though, since Objective-C is just a tiny extension of C). You may also find the headers limits.h and inttypes.h to be useful.

User · Answer

This is a good overview   http   reference jumpingmonkey org programming languages objective-c types html  or run this code   32 bit process     NSLog   Primitive sizes       NSLog   The size of a char is   d    sizeof char      NSLog   The size of short is   d    sizeof short      NSLog   The size of int is   d    sizeof int      NSLog   The size of long is   d    sizeof long      NSLog   The size of long long is   d    sizeof long long      NSLog   The size of a unsigned char is   d    sizeof unsigned char      NSLog   The size of unsigned short is   d    sizeof unsigned short      NSLog   The size of unsigned int is   d    sizeof unsigned int      NSLog   The size of unsigned long is   d    sizeof unsigned long      NSLog   The size of unsigned long long is   d    sizeof unsigned long long      NSLog   The size of a float is   d    sizeof float      NSLog   The size of a double is  d    sizeof double       NSLog   Ranges       NSLog   CHAR MIN     c     CHAR MIN     NSLog   CHAR MAX     c     CHAR MAX     NSLog   SHRT MIN     hi    SHRT MIN         signed short int   NSLog   SHRT MAX     hi    SHRT MAX     NSLog   INT MIN      i     INT MIN     NSLog   INT MAX      i     INT MAX     NSLog   LONG MIN     li    LONG MIN         signed long int   NSLog   LONG MAX     li    LONG MAX     NSLog   ULONG MAX    lu    ULONG MAX        unsigned long int   NSLog   LLONG MIN    lli   LLONG MIN        signed long long int   NSLog   LLONG MAX    lli   LLONG MAX     NSLog   ULLONG MAX   llu   ULLONG MAX       unsigned long long int   When run on an iPhone 3GS  iPod Touch and older iPhones should yield the same result  you get   Primitive sizes  The size of a char is  1                  The size of short is  2                   The size of int is  4                     The size of long is  4                    The size of long long is  8               The size of a unsigned char is  1         The size of unsigned short is  2          The size of unsigned int is  4            The size of unsigned long is  4           The size of unsigned long long is  8      The size of a float is  4                 The size of a double is 8                 Ranges                                    CHAR MIN    -128                          CHAR MAX    127                           SHRT MIN    -32768                        SHRT MAX    32767                         INT MIN     -2147483648                   INT MAX     2147483647                    LONG MIN    -2147483648                   LONG MAX    2147483647                    ULONG MAX   4294967295                    LLONG MIN   -9223372036854775808          LLONG MAX   9223372036854775807           ULLONG MAX  18446744073709551615    64 bit process   The size of a char is  1  The size of short is  2  The size of int is  4  The size of long is  8  The size of long long is  8  The size of a unsigned char is  1  The size of unsigned short is  2  The size of unsigned int is  4  The size of unsigned long is  8  The size of unsigned long long is  8  The size of a float is  4  The size of a double is 8  Ranges  CHAR MIN    -128 CHAR MAX    127 SHRT MIN    -32768 SHRT MAX    32767 INT MIN     -2147483648 INT MAX     2147483647 LONG MIN    -9223372036854775808 LONG MAX    9223372036854775807 ULONG MAX   18446744073709551615 LLONG MIN   -9223372036854775808 LLONG MAX   9223372036854775807 ULLONG MAX  18446744073709551615

User · Answer

Update for the new 64bit arch  Ranges  CHAR MIN    -128 CHAR MAX    127 SHRT MIN    -32768 SHRT MAX    32767 INT MIN     -2147483648 INT MAX     2147483647 LONG MIN    -9223372036854775808 LONG MAX    9223372036854775807 ULONG MAX   18446744073709551615 LLONG MIN   -9223372036854775808 LLONG MAX   9223372036854775807 ULLONG MAX  18446744073709551615

[ios] Types in Objective-C on iOS

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