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Function Details : setlocale

char *setlocale(int category,const char * locale) ;

Return Type : char *

String pointer (array of characters)
Read about return values of setlocale function .

1st Parameter Type : int

Integer type (typically 4 bytes, -2,147,483,648 to 2,147,483,647)

1st Parameter

Specifies the category of locale information to be modified or queried, such as `LC_ALL`, `LC_TIME`, or `LC_NUMERIC`.

2nd Parameter Type : const char *

Pointer to read-only string

2nd Parameter

A pointer to a string specifying the locale to set. If `locale` is `NULL`, the current setting for the specified category is returned.

Read more about parameters of setlocale in parameters section
The setlocalefunction in C language Sets or queries the program's locale.
The setlocale function is used to set or query the program's current locale. The locale affects the behavior of functions that are sensitive to cultural differences, such as the formatting of numbers, dates, and currency values. It can set the entire locale or specific categories of the locale.
The setlocalefunction takes 2 parameters:
  • •
    int `category`: Specifies the category of locale information to be modified or queried, such as `LC_ALL`, `LC_TIME`, or `LC_NUMERIC`.
  • •
    const char * `locale`: A pointer to a string specifying the locale to set. If `locale` is `NULL`, the current setting for the specified category is returned.
Sets or retrieves the current locale for a specified category. If `locale` is not `NULL`, the function sets the locale for `category` to the specified value. If `locale` is `NULL`, the function returns the name of the current locale for the category. Returns a pointer to the name of the locale set, or `NULL` if the locale cannot be set.
The setlocale function return value :
  • Returns a pointer to a string identifying the new locale on success, or NULL on failure
  • If the second argument is NULL, it returns the current locale string without changing it

Output

This example sets the program's locale to the system default and then prints a locale-dependent floating-point number.