22.5 IsWord

IsWord( obj )

IsWord returns true if the object obj, which may be an object of arbitrary type, is a word and false otherwise. Signals an error if obj is an unbound variable.

    gap> a := AbstractGenerator("a");;
    gap> b := AbstractGenerator("b");;
    gap> w := (a^2*b)^5*b^-1;
    a^2*b*a^2*b*a^2*b*a^2*b*a^2
    gap> IsWord( w );
    true
    gap> a := (1,2,3);;
    gap> IsWord( a^2 );
    false 

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