Update funcWithStrsAndConds.ptx

Author: barbarer

pretext/functions/funcWithStrsAndConds.ptx

@@ -275,6 +275,10 @@ myTests().main()
         </input>
       </program>
     </exercise>
+
+    <note>
+      <p>The first character is at index 0 and an index of -1 means the last charater.</p>
+    </note>
 </subsection>
 <subsection xml:id="fsc_string-slices">
     <title>String Slices</title>
@@ -366,6 +370,7 @@ main()
 
    <subsection xml:id="fsc_basic-conditionals-and-tests">
     <title>Basic Conditionals and Tests</title>
+    <p>You can execute code only when a condition is true using <c>if</c>.  You can execute one block of code when a condition is true (using <c>if</c>) or false (using <c>else</c>).  You can even speicfy more than two outcomes as shown in the code below.</p>
     <exercise label="fsc_fitb_return_temp_first_line">
       <statement>
         <p>What is the first thing (first line of text) that will be printed when the code below runs? <var/>  </p>