Ubuzuba, ngokuvamile obukhonjiswa ngophawu- e buwumlelesa odluliswa inelesi eyodwa noma, ngokulinganayo, ubukhulu bomlelesa ophikayo odluliswa inzuba eyodwa, enomlelesa −1 e . 
- ↑ The symbol e has many other meanings. Somewhat confusingly, in atomic physics, e sometimes denotes the electron charge, i.e. the negative of the elementary charge. In the US, the base of the natural logarithm is often denoted e (italicized), while it is usually denoted e (roman type) in the UK and Continental Europe.