title: Add string to beginning of another string
body: <p><strong>Basic question</strong></p>
  
  <p>I have 2 strings. I want to add one string to another? Here's an example:</p>
  
  <pre><code>var secondString= "is your name."
  var firstString = "Mike, "
  </code></pre>
  
  <p>Here I have 2 strings. I want to add <code>firstString</code> to <code>secondString</code>, NOT vice versa. (Which would be: <code>firstString += secondString</code>.)</p>
  
  <p><strong>More detail</strong></p>
  
  <p>I have 5 <code>string</code></p>
  
  <pre><code>let first = "7898"
  let second = "00"
  let third = "5481"
  let fourth = "4782"
  
  var fullString = "\(third):\(fourth)"
  </code></pre>
  
  <p>I know for sure that <code>third</code> and <code>fourth</code> will be in <code>fullString</code>, but I don't know about <code>first</code> and <code>second</code>.</p>
  
  <p>So I will make an <code>if statement</code> checking if <code>second</code> has <code>00</code>. If it does, <code>first</code> and <code>second</code> won't go in <code>fullString</code>. If it doesn't, <code>second will go into</code>fullString`.</p>
  
  <p>Then I will check if <code>first</code> has <code>00</code>. If it does, then <code>first</code> won't go inside of <code>fullString</code>, and if not, it will go.</p>
  
  <p>The thing is, I need them in the same order: first, second, third fourth. So in the if statement, I need a way to potentially add <code>first</code> and <code>second</code> at the beginning of <code>fullString</code>.</p>