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         	<h1 class="section-header">Operators</h1><hr>
			
			<p class="section-content">
			An operator is a special symbol or phrase that you use to check, change, or combine values. For example, the addition operator (+) adds two numbers, as in <strong>var i = 1 + 2</strong>, and the logical AND operator (&&) combines two Boolean values, as in <strong>if (flag1 && flag2)</strong>.
			<br><br>
			Gravity supports most standard C operators and improves several capabilities to eliminate common coding errors. The assignment operator (=) does not return a value, to prevent it from being mistakenly used when the equal to operator (==) is intended. Gravity also provides two <a href="types.html">range</a> operators as a shortcut for expressing a range of values.
			</p>
			
			<!-- ARITHMETIC -->
			<h4 class="section-h4">Arithmetic Operators</h4>
			<p>
			<ul>
				<li>Addition (+)</li>
				<li>Subtraction (-)</li>
				<li>Multiplication (*)</li>
				<li>Division (/)</li>
				<li>Remainder (%)</li>
			</ul>
			</p>
			<pre><code class="swift">
	var n1 = 1 + 2		// equals 3
	var n2 = 5 - 3		// equals 2
	var n3 = 2 * 3		// equals 6
	var n4 = 10.0 / 2.5	// equals 4.0
	var n5 = 9 % 4		// equals 1
			</code></pre>
			<p>Special attention has been placed in the division operator. A Division between two Int usually result in a Float in order to not truncate any decimal.</p>
			
			<!-- ASSIGNMENT -->
			<h4 class="section-h4">Assignment Operator</h4>
			<p>The assignment operator = initialize or update a value:</p>
			<pre><code class="swift">
	var a = 50;		// a = 50
	var b = a;		// b = 50
	var c = a * b;		// c = 50 * 50
			</code></pre>
			<p>Please note that contrary to many other programming languages, the assignment operator has no side effect, it means that it does not return any value.</p>

			<!-- COMPARISON -->
			<h4 class="section-h4">Comparison Operators</h4>
			<p>The comparison operators return a Bool value to indicate whether or not the statement is true:</p>
			<p>
			<ul>
				<li>Equal (==)</li>
				<li>Not equal (!=)</li>
				<li>Less than (<)</li>
				<li>Less than or equal (<=)</li>
				<li>Greater than (>)</li>
				<li>Greater than or equal (>=)</li>
				<li>Identical (===)</li>
				<li>Not identical (!==)</li>
				<li>Type check (is)</li>
				<li>Pattern match (~=)</li>
			</ul>
			</p>
			<pre><code class="swift">
	1 == 1		// true because 1 is equal to 1
	1 != 2		// true because 1 is not equal to 2
	1 < 2		// true because 1 is less than 2
	1 <= 1		// true because 1 is less than or equal to 1
	1 > 2		// false because 1 is not greater than 2
	1 >= 1		// true because 1 is greater than or equal to 1
	1 === 1		// true because 1 is identical to 1 (same value and same class)
	1 is Int	// true because 1 is of class Int
			</code></pre>
			<p>Gravity performs some conversions at runtime, so 1 == "1" but not 1 === '1'.</p>

			<!-- LOGICAL -->
			<h4 class="section-h4">Logical Operators</h4>
			<p>The comparison operators return a Bool value to indicate whether or not the statement is true:</p>
			<p>
			<ul>
				<li>Logical NOT (!)</li>
				<li>Logical AND (&&)</li>
				<li>Logical OR (||)</li>
			</ul>
			</p>
			<pre><code class="swift">
	!1		// false because 1 is true
	1 && 0		// false because one of the two values is false
	1 || 0		// true because one of the two values is true
			</code></pre>
			<p>In order to improve code readability the reserved keywords <strong>not, and, or</strong> has been introduces as an alisas to logical operators.</p>
			
			<!-- BITWISE -->
			<h4 class="section-h4">Bitwise Operators</h4>
			<p>
			<ul>
				<li>Bitwise shift left (<<)</li>
				<li>Bitwise shift right (>>)</li>
				<li>Bitwise AND (&)</li>
				<li>Bitwise OR (|)</li>
				<li>Bitwise XOR (^)</li>
				<li>Bitwise NOT or one's complement (~)</li>
			</ul>
			</p>
			<pre><code class="swift">
	var n = 0B00110011;
	var n1 = n << 2			// equals 11001100
	var n2 = n >> 2			// equals 00001100
	var n3 = n & 0B00001111		// equals 00000011
	var n4 = n | 0B00001111		// equals 00111111
	var n5 = n ^ 0B00001111		// equals 00111100
	var n6 = ~n;			// equals 11001100
			</code></pre>
			
			<!-- COMPOUND -->
			<h4 class="section-h4">Compound Assignment Operators</h4>
			<p>As a shortcut, assignment and operators can be combined together:
			<ul>
				<li>Multiply and assign (*=)</li>
				<li>Divide and assign (/=)</li>
				<li>Remainder and assign (%=)</li>
				<li>Add and assign (+=)</li>
				<li>Subtract and assign (-=)</li>
				<li>Left bit shift and assign (<<=)</li>
				<li>Right bit shift and assign (>>=)</li>
				<li>Bitwise AND and assign (&=)</li>
				<li>Bitwise XOR and assign (^=)</li>
				<li>Bitwise OR and assign (|=)</li>
			</ul>
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