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Asked: 2026-05-12T10:14:26+00:00

This is related to following question, How to Declare a 32-bit Integer in C

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This is related to following question,

How to Declare a 32-bit Integer in C

Several people mentioned int is always 32-bit on most platforms. I am curious if this is true.

Do you know any modern platforms with int of a different size? Ignore dinosaur platforms with 8-bit or 16-bit architectures.

NOTE: I already know how to declare a 32-bit integer from the other question. This one is more like a survey to find out which platforms (CPU/OS/Compiler) supporting integers with other sizes.

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1 Answer

  1. Editorial Team

    As several people have stated, there are no guarantees that an ‘int’ will be 32 bits, if you want to use variables of a specific size, particularly when writing code that involves bit manipulations, you should use the ‘Standard Integer Types’ mandated by the c99 specification.

    int8_t
uint8_t
int32_t
uint32_t

    etc…

    they are generally of the form [u]intN_t, where the ‘u’ specifies that you want an unsigned quantity, and N is the number of bits

    the correct typedefs for these should be available in stdint.h on whichever platform you are compiling for, using these allows you to write nice, portable code 🙂

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