Real numbers may contain a decimal point or the letter "e" to signify an "exponent of 10". Use control-minus to enter a negative sign.
Examples: 1, 1.2, 1.2e12, -1.2e-12.
Real numbers are displayed using the current display mode: std, eng, fix, or sci.
The period (.) and comma (,) may be swapped depending on Windows regional number settings.