MATLAB Function Reference |

**Syntax**

**Description**

Use the character `j`

in place of the character `i`

, if desired, as the imaginary unit.

As the basic imaginary unit `sqrt(-1)`

, `j`

is used to enter complex numbers. Since `j`

is a function, it can be overridden and used as a variable. This permits you to use `j`

as an index in `for`

loops, etc.

It is possible to use the character `j`

without a multiplication sign as a suffix in forming a numerical constant.

**Examples**

**See Also**

isvarname | javaArray |