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<div><a href="index.html" title="">Macaulay2Doc</a> > <a href="___The_sp__Macaulay2_splanguage.html" title="">The Macaulay2 language</a> > <a href="_variables.html" title="The variables of a complex or co-complex.">variables</a> > <a href="_numbered_spvariables.html" title="">numbered variables</a></div>
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<div><h1>numbered variables</h1>
<div>One way to get many variables suitable for use as indeterminates in a polynomial ring is with the function <a href="_vars.html" title="variables">vars</a>. It converts a list or sequence of integers into symbols. It prefers to hand out symbols whose name consists of a single letter, but there are only 52 such symbols, so it also uses symbols such as <tt>x55</tt> and <tt>X44</tt>.<table class="examples"><tr><td><pre>i1 : vars (0 .. 9,40,100,-100)
o1 = (a, b, c, d, e, f, g, h, i, j, O, x48, X100)
o1 : Sequence</pre>
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These variables can be used to make polynomial rings.<table class="examples"><tr><td><pre>i2 : ZZ[vars(0 .. 10)]
o2 = ZZ[a, b, c, d, e, f, g, h, i, j, k]
o2 : PolynomialRing</pre>
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