What is the value range of int32?

The value range of int32 is "-2147483648" to "2147483647"; while the value range of int64 is "-9223372036854775808" to "9223372036854775808".

The value range of int32

The range of 32-bit int type variables in the computer , where type int is a signed integer.

Positive numbers are expressed as original codes in the computer, and the highest bit is the sign bit: The original code of

1 is the original code of 0000 0000 0000 0000 0000 0000 0000 0001

2147483647 The code is 0111 1111 1111 1111 1111 1111 1111 1111

So the largest positive integer is 2147483647

Negative numbers are represented as complement codes in the computer, and the highest bit is the sign bit:

-1:

The original code is 1000 0000 0000 0000 0000 0000 0000 0001, the inverse code of

is 1111 1111 1111 1111 1111 1111 1111 1110, the complement code of

is 1111 1111 1111 1111 1111 1111 1111 1111

-2147483647: The original code of

is 1111 1111 1111 1111 1111 1111 1111 1111, the reverse code of

is 1000 0000 0000 000 0 0000 0000 0000 0000 ,

The complement is 1000 0000 0000 0000 0000 0000 0000 0001

So the smallest negative number is -2147483647? Wrong, no.

In binary, there are two table methods for 0.

The original code of 0 is 0000 0000 0000 0000 0000 0000 0000 0000, the original code of

-0 is 1000 0000 0000 0000 0000 0000 0000 0000,

because 0 is only One is needed, so use -0 as the smallest number -2147483648. The complement code of

-2147483648 is expressed as 1000 0000 0000 0000 0000 0000 0000 0000. There is no original code in 32 bits.

Note that this complement is not the real complement. The real complement is 1 1000 0000 0000 0000 0000 0000 0000 0000, which is an overflow.

So the signed 32-bit int type integer is -2147483648~2147483647

Explanation:

int range -2,147,483,648 to 2,147,483,647

int16 - Numeric range: -32768 to 32767

int32 - Numeric range: -2,147,483,648 to 2,147,483,647

int64 - Numeric range: -9223372036854775 808 to 9223372036854775808

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