l defines variables for the amount of each product that needs to be consumed to meet daily nutritional requirements.</p>
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<pre class="highlight"><code class="language-fsharp" data-lang="fsharp">// products
let A = Variable.integer  "A" 0 100 |&gt; toExpression
let B = Variable.integer  "B" 0 100 |&gt; toExpression
let C = Variable.integer  "C" 0 100 |&gt; toExpression
let D = Variable.integer  "D" 0 100 |&gt; toExpression


let mdl =
  Model.Default
  |