The "constant" command is used to remove a variable (or variables) from the entire set of equations by replacing all occurrences of the variable with its current numeric value. Once turned into a numeric constant, the variable no longer appears in any equation, and the variable definition is automatically "clear"ed (unless the variable is "lock"ed).
e.g. f=mg Enter a basic equation from physics.
g=9.8 Define "g", the acceleration of gravity.
constant g Make "g" a constant, leaving "f=9.8m"
If the need for a constant is not permanent, consider using the "lock" command to create a symbolic constant instead.See also: clear, lock, unlock