The function order returns the degree of the indeterminate in the $\mathrm{O}\left(x\right)$ term of a series.  If there is no order term in the series then the name infinity is returned.

This function only works with expressions of type series.

The order command is thread-safe as of Maple 15.

For more information on thread safety, see index/threadsafe.

$\mathrm{series}\left(\frac{1}{1-x}\,x\right)$

$1+x+x^2+x^3+x^4+x^5+O\left(x^6\right)$

$\mathrm{order}\left(\right)$

$6$

$\mathrm{series}\left(x^2\,x=1\right)$

$1+2\left(x-1\right)+{\left(x-1\right)}^2$

$\mathrm{order}\left(\right)$

$\mathrm{\infty }$