␉
ASCII Character ␉
Horizontal TabThe most known and common tab is a horizontal tabulation (HT) or character tabulation, which in ASCII has the decimal character code of 9, and may be referred to as Ctrl+I or ^I. In C and many other programming languages the escape sequence \t can be used to put this character into a string literal. The horizontal tab is usually inserted when the Tab key on a standard keyboard is pressed. Originally, printer mechanisms used mechanical tab stops to indicate where the tabs went.