X86 quadruple word, minimum size of long long in C, actual size of long for most modern C compilers, pointer for x86-64-compatible processors X86 double word, minimum size of long in C, actual size of int for most modern C compilers, pointer for IA-32-compatible processors X86 word, minimum size of short and int in C Signed range ( two's complement representation)īyte, octet, minimum size of char in C99( see limits.h CHAR_BIT) Integers may be either signed (allowing negative values) or unsigned ( non-negative integers only). Integer numbers Īn integer data type represents some range of mathematical integers. Minimally, there are four types, char, int, float, and double, but the qualifiers short, long, signed, and unsigned mean that C contains numerous target-dependent integer and floating-point primitive types. The set of basic C data types is similar to Java's. But the choice of primitive data type may affect performance, for example it is faster using SIMD operations and data types to operate on an array of floats. Integer addition, for example, can be performed as a single machine instruction, and some offer specific instructions to process sequences of characters with a single instruction. Primitive data types which are native to the processor have a one-to-one correspondence with objects in the computer's memory, and operations on these types are often the fastest possible in most cases. Operations on such primitives are usually quite efficient. These primitive types are in general precisely those supported by computer hardware, except possibly for varying integer sizes or hardware that is missing floating point. ( returnAddress) This is not accessible from the Java programming language and is usually left out.
Integer types with a variety of ranges and precisions ( byte, short, int, long, char).The Java virtual machine's set of primitive data types is:
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