This is basically a backslash “\” that is used in combination with other characters to print out impossible characters in programming languages like C, C#.
. In c, all escape sequences consist of two or more characters it a combination of backslash and characters.
The Meaning of Escape Sequence in C
An escape sequence is a sequence of characters that helps to convert some other characters(or escape sequence does not represent itself). for example, it’s impossible to print the newline so we use escape sequences to print newline by using backslash “\” and character “n” together “\n“.