<p>May be this</p>
<div class="highlight highlight-source-shell"><pre><span class="pl-c"><span class="pl-c">#!</span>/bin/sh</span>

<span class="pl-en">get_answer</span> ()
{
    value=<span class="pl-smi">$1</span>
    question=<span class="pl-smi">$2</span>
    <span class="pl-k">if</span> [ <span class="pl-s"><span class="pl-pds">"</span><span class="pl-smi">${value}</span><span class="pl-pds">"</span></span> <span class="pl-k">=</span> <span class="pl-s"><span class="pl-pds">"</span>ask<span class="pl-pds">"</span></span> ]<span class="pl-k">;</span> <span class="pl-k">then</span>
        <span class="pl-c1">echo</span> -n <span class="pl-s"><span class="pl-pds">"</span><span class="pl-smi">$question</span><span class="pl-pds">"</span></span>
        <span class="pl-c1">read</span> value
    <span class="pl-k">fi</span>
    ANSWER=<span class="pl-s"><span class="pl-pds">$(</span>echo <span class="pl-smi">${value}</span> <span class="pl-k">|</span> grep -o -e <span class="pl-s"><span class="pl-pds">'</span>[YyNn]<span class="pl-pds">'</span></span> <span class="pl-k">|</span> sed -e <span class="pl-s"><span class="pl-pds">'</span>s/Y/y/<span class="pl-pds">'</span></span> -e <span class="pl-s"><span class="pl-pds">'</span>s/N/n/<span class="pl-pds">'</span></span><span class="pl-pds">)</span></span>
}

get_answer ask <span class="pl-s"><span class="pl-pds">"</span>My question?<span class="pl-pds">"</span></span></pre></div>

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