# Scientific notation and E-notation

## Scientific notation and E-notation

Scientific notation is a way of expressing numbers that are too big or too small to be conveniently written in decimal form. Any real number can be written expressed as *m* × 10^{n}, which in E-notation is written as *m*E*n*.

For example:

0.00000352 is 35.2 × 10^{−7}, which is written as 35.2E-7 (or 35.2E-007)

## Engineering notation

Engineering notation differs from normalized scientific notation in that the exponent *n* is restricted to multiples of 3.

For example:

0.00000352 is 3.52E-6

MedCalc sometimes uses E-notation to represent very small or large numbers.