Imaginary Unit
i
Type it
| Unicode | U+0069 | |
|---|---|---|
| LaTeX | i | |
| HTML entity | i | |
| Character | i |
Meaning
A number whose square is −1. Complex numbers are written as a + bi with a and b real. In engineering it is often written j. Compare with Euler's Number and Real Numbers.
How to read it
i² = −1
is read “i squared equals minus one”.