Doubt related to char data type

sir char data type is used to store only single character so how it is possible to store more than one character and if we store like this than what is the use use of string data type and arrays?

For more than one character, you can use an array of characters. In C, we implement a string using array of characters.

but sir using char only in lst lecture sir was storing more than one character how is that possible?

It must be a character array. Share the name of the lecture video so that i can check.