More proofreading

code/boolean-logic.php

@@ -14,7 +14,7 @@ $a && $b;
 $a && $c;
 
 // Using two pipe characters checks if either value is true.
-// Then, it will return true. If both values are false, the PHP
+// Then, it will return true. If both values are false, then PHP
 // returns false.
 $a = true;
 $b = false;

code/comparisons.php

@@ -2,7 +2,7 @@
 
 // A boolean is a value that is always 0 or 1, yes or no, on or off.
 // In PHP, a boolean is represented by the words true and false.
-// While programming, you will often want to know if something is true or false.
+// While programming, you will often want to know if something is positive or negative.
 $a = true;
 $b = false;
 
@@ -35,7 +35,13 @@ $one >= $two;
 // by using three equal signs.
 
 // This returns true.
+1 == 1;
 1 == '1';
+1 == true;
+1 == 1.0;
+1 === 1;
 
 // This returns false.
 1 === '1';
+1 === true;
+1 === 1.0;

code/conditionals.php

@@ -62,7 +62,7 @@ switch ($drink) {
 $language = 'english';
 echo $language == 'spanish' ? "hola\n" : "hello\n";
 
-// Lastly, there is another form of a ternary that checks if a value is set and then returns the value to the right of two question marks if value is null.
+// Lastly, there is another form of a ternary that checks if a value is set and then returns the value to the right of the two question marks if the value is null.
 echo $IDoNotExist ?? "Variable not set\n";
 
 // You can also chain multiple checks in a row.