Final answer:
The escape sequence for a tab is represented by \t, which is used in coding to create a horizontal tab space in the output.
Step-by-step explanation:
The symbol that represents the escape sequence for a tab in many programming languages is \t. This sequence is used when writing code to indicate a horizontal tab space. When the code or text containing the escape sequence is processed by a computer, each instance of \t is converted into a space that spans the width of a tab character, which is often equivalent to several regular spaces (the exact number can vary depending on the environment or application).