You can use several different constants in your mathematical expressions.
Note: When you enter constants multiplied by a number, make sure to indicate the multiplication explicitly. For example, enter 2*c instead of 2c, and enter -4*iinstead of -4i.
| Constant | Value |
| C | The speed of light in m/s (2.998^8) |
| e | Euler’s number (2.718…) |
| g | Gravity (9.80 m/s^2) |
| i | The square root of -1 |
| j | The square root of -1 |
| k | The Boltzmann constant (~1.38^-23 in Joules/Kelvin) |
| pi | The ratio of a circle’s circumference to its diameter (3.14159…) |
| q | The fundamental charge (~1.602^-19 Coloumbs) |
| T | The positive difference between 0K and 0°C (273.15) |
For more information, see Entering math expressions in assignments or the calculator, or Entering math expressions in course discussions.