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The length name <var>len</var> must 0132 begin with a backslash, <code>\</code>. 0133 </p> 0134 <p>This will show how low the character descenders go. 0135 </p> 0136 <div class="example"> 0137 <pre class="example">\newlength{\alphabetdepth} 0138 \settodepth{\alphabetdepth}{abcdefghijklmnopqrstuvwxyz} 0139 \the\alphabetdepth 0140 </pre></div> 0141 0142 <p>If you did not set aside the length <var>len</var>, if for example you 0143 mistype the above as <code>\settodepth{\aplhabetdepth}{abc...}</code>, 0144 then you get something like ‘<samp>Undefined control sequence. <argument> 0145 \aplhabetdepth</samp>’. If you leave the backslash out of <var>len</var>, as in 0146 <code>\settodepth{alphabetdepth}{...}</code> then you get something like 0147 ‘<samp>Missing number, treated as zero. <to be read again> \setbox</samp>’. 0148 </p> 0149 0150 0151 0152 <hr/><div class='referenceinfo'> <a href='https://latexref.xyz/'> <i>Unofficial LaTeX2e reference manual</i></a></div> 0153 </body> 0154 </html>