The tolower() function is defined in the ctype.h header file. If the character passed is a uppercase alphabet then the tolower() function converts a uppercase alphabet to an lowercase alphabet.
int tolower(int ch);
Parameter: This method takes a mandatory parameter ch which is the character to be converted to lowercase.
Return Value: This function returns the lowercase character corresponding to the ch.
Below programs illustrate the tolower() function in C:
G in lowercase is represented as = g
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