What does l mean in c language?

The meaning of "l" in C language is a letter constant prefix used to convert integer constants to long type, extending its range to 2^63 (-9223372036854775808 to 9223372036854775807). Syntax: long_constant = value[l], where long_constant is a long variable or constant, value is an integer constant, and [l] is a letter constant prefix.

The "l" in C language

means:
"l " is a letter constant prefix in C language, indicating that the constant is of long type.

Usage:
The "l" prefix is ​​used to convert an integer constant to type long, extending its representation range to 2^63 (-9223372036854775808 to 9223372036854775807). Without the "l" prefix, integer constants default to type int.

Syntax:

long_constant = value[l];

Among them:

• long_constant is a long type variable or constant
• value is an integer constant
• [l] is an alphabetical constant prefix

Example:

int x = 12345; // int 常量
long y = 1234567890l; // long 常量

In the above example, "x" is an int type constant, and "y" is a long type constant.

Note:

• The "l" prefix can only be used for integer constants, not floating point numbers.
• For integer constants, using the "l" prefix is ​​more explicit than using no prefix because it explicitly specifies the type of the constant.
• In C99 and newer versions, you can also use the "LL" prefix to represent long long type constants.

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