Answer:
static character
A static character is a type of character who remains largely the same throughout the course of the storyline. Their environment may change, but they retain the same personality and outlook as they had at the beginning of the story. It's common for secondary characters in stories to be static.
To find whether a string has all the same characters. Traverse the whole string from index 1 and check whether that character matches the first character of the string or not. If yes, then match until string size. If no, then break the loop
