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C++ strlwr() function

The strlwr() is string manipulation function defined in the cstring header file, which is used to convert all the characters in a string to lower case letters i.e. a string which is stored in a c-style char array.

Signature of strlwr() function

char * strlwr(char *str);


The function strlwr() when called on any char[] array, containing a string value, returns its contents as an lower case string.

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