The symbol used by engineers and some physicists to denote *i*, the imaginary number .
is probably preferred over
because the symbol
(or ) is commonly used to denote current.

# j

## See also

*i*, Imaginary Number, Imaginary Unit

## Explore with Wolfram|Alpha

## Cite this as:

Weisstein, Eric W. "j." From *MathWorld*--A
Wolfram Web Resource. https://mathworld.wolfram.com/j.html