The letter *j* is used to signify that a number is an imaginary number in electrical engineering. Normally the letter *i* is used, but in electrical engineering *j* is used instead to avoid conflict with the symbol for current.
See
Imaginary numbers.

- What are scalars?
- Real numbers
- Integers
- Natural Numbers
- Positive numbers
- Negative numbers
- The uses of negative numbers
- Scientific notation (normal form)
- Complex numbers
- Imaginary numbers

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