length(A)

The length command computes the length of the top level of an expression A. Square brackets can be used to index the parts of an expression from 0 to length-1.

Examples

f = x^2+x+1;
f;
	1+x+x^2
length(f);
	3
f[0]; f[1]; f[2];
	1
	x
	x^2