Section 4.6 Word Matching Exercise
isdigit(ch)
isalpha(ch)
isalnum(ch)
islower(ch)
isupper(ch)
tolower(ch)
toupper(ch)
| returns true if the specified character is a lowercase letter. | |
| returns the uppercase of the specified character. | |
| returns true if the specified character is a digit. | |
| returns true if the specified character is a letter. | |
| returns true if the specified character is a letter or a digit. | |
| returns true if the specified character is an uppercase letter. | |
| returns the lowercase letter for the specified character. |
