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Constant

Constant

is an attribute that indicates that a symbol is a constant.

See:

Examples

Mathematical constants like E have attribute Constant:

>> Attributes(E)
{Constant}

Constant symbols cannot be used as variables in Solve and related functions.

E is a constant symbol and not a valid variable.

>> Solve(x + E == 0, E)
Solve(E+x==0,E)

Attributes, ClearAttributes, Flat, HoldAll, HoldFirst, HoldRest, Listable, NHoldAll, NHoldFirst, NHoldRest, Orderless, SetAttributes