The role of long in c language

The long type is used in C language to store a larger range of integers than the int type. It is mainly used for: storing integers beyond the range of int. Stores higher precision integers because they usually have a larger bit width. Store pointer variables, which usually need to store larger address values.

The role of long in C language

long is a data type in C language, used to store ratios A larger integer of type int.

Function:

The long type is mainly used in the following situations:

• Storage integers larger than the allowed range of the int type (the int type is in different The allowed range may differ between compilers and platforms).
• Stores more precise integers than the int type because the long type generally has a larger bit width and can represent larger values.
• Storage pointer variables, because pointer variables usually need to store larger address values.

Range:

The range of long type is usually between (-2^31, 2^31-1), but it may also vary depending on the reason. Compiler and platform specific.

Usage:

To declare a long type variable, you can use the following syntax:

<code class="c">long variable_name;</code>

For example:

<code class="c">long my_long_number; // 声明一个 long 类型的变量</code>

Notes:

When using the long type, you need to pay attention to the following points:

• The long type usually takes up more memory space than the int type.
• When performing arithmetic operations, if one operand is of type long, the other operand will be automatically promoted to type long.
• Because the long type may have different ranges, you should be careful when using the long type in cross-platform programs.

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