C data types - Wikipedia
https://en.wikipedia.org:443/wiki/C_data_types
OverviewPrimary typesFixed-width integer typesAdditional floating-point typesStructuresArraysPointersUnionsThe C language provides the four basic arithmetic type specifiers char, int, float and double, and the modifiers signed, unsigned, short, and long. The following table lists the permissible combinations in specifying a large set of storage size-specific declarations. The actual size of the integer types varies by implementation. The standard requires only size relations between the data types and minimum sizes for each data type:
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