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1# basic_json::value_t
2
3```cpp
4enum class value_t : std::uint8_t {
5    null,
6    object,
7    array,
8    string,
9    boolean,
10    number_integer,
11    number_unsigned,
12    number_float,
13    binary,
14    discarded
15};
16```
17
18This enumeration collects the different JSON types. It is internally used to distinguish the stored values, and the
19functions [`is_null`](is_null.md), [`is_object`](is_object.md), [`is_array`](is_array.md), [`is_string`](is_string.md),
20[`is_boolean`](is_boolean.md), [`is_number`](is_number.md) (with [`is_number_integer`](is_number_integer.md),
21[`is_number_unsigned`](is_number_unsigned.md), and [`is_number_float`](is_number_float.md)),
22[`is_discarded`](is_discarded.md), [`is_binary`](is_binary.md), [`is_primitive`](is_primitive.md), and
23[`is_structured`](is_structured.md) rely on it.
24
25## Note
26
27There are three enumeration entries (number_integer, number_unsigned, and number_float), because the library
28distinguishes these three types for numbers: [`number_unsigned_t`](number_unsigned_t.md) is used for unsigned integers,
29[`number_integer_t`](number_integer_t.md) is used for signed integers, and [`number_float_t`](number_float_t.md) is used
30for floating-point numbers or to approximate integers which do not fit in the limits of their respective type.
31
32## Version history
33
34- Added in version 1.0.0.
35- Added unsigned integer type in version 2.0.0.
36- Added binary type in version 3.8.0.
37