What are the simple data types in C language?

The simple data types in the C language are: 1. Integer type [int, short, long, long long]; 2. Floating point type [float, double]; 3. Character type [char].

The simple data types in C language are:

1. Integer (number) type

• int: basic integer type, used to store integers, occupies 4 bytes; the default value is 0, data The range is -2147483648~2147483647

• short: short integer, occupies 2 bytes, the storage method is the same as the basic integer, the data range is -32768-32767

• long: long integer, occupies 4 bytes, the data range is -2^63~2^63-1

• long long: double long integer type, occupies 8 bytes, and the data range is -2^63~2^63-1; this data type is generally less used.

2. Floating point type

• float: single precision floating point type, accounting for 4 bytes, valid numbers are (6~7 digits), the data range is -3.4*10^38~ 3.4*10^38

• float type variable is composed of limited storage The unit composition, therefore, can only provide a limited number of significant digits, and numbers outside the significant digits will not be precise, so some errors may occur.

• double: double precision floating point type, occupies 8 bytes, valid digits are (15~16 bits), data range is -1.7*10^-308~1.7*10 ^308.

3. Character type

• char: Character type, used to store a single character , accounting for 1 byte.

Note: In C language, char array is used to store strings. Example:

char c;
c='a';   //是正确的，
c="a";  //是错误的
c="abcd";  //是错误的

char string[4];
string="abcd";  //是正确的，

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