If Statement - Revision history

Albinopapa: /* What's really going on here tho */

2018-10-17T17:41:03Z

‎What's really going on here tho

Chili: /* Using If Statements */

2018-06-17T13:25:15Z

‎Using If Statements

Chili: /* Other Tutorials */

2018-06-17T13:23:14Z

‎Other Tutorials

Chili: /* Planet Chili Tutorial Video */

2018-06-17T13:22:37Z

‎Planet Chili Tutorial Video

Chili: /* See Also */

2018-06-17T13:22:27Z

‎See Also

Chili at 13:22, 17 June 2018

2018-06-17T13:22:15Z

Chili: /* What's really going on here tho */

2018-06-17T13:19:30Z

‎What's really going on here tho

Chili: /* Tutorial Video */

2018-06-17T13:18:57Z

‎Tutorial Video

Chili: /* See Also */

2018-06-17T13:18:42Z

‎See Also

Chili: /* Using If Statements */

2018-06-17T13:13:13Z

‎Using If Statements

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 When you run your program all your C++ code is converted to machine code all of which is loaded into memory. When you use an <code>if</code> statement, you're effectively telling your computer - if this condition is true then jump to another location in memory, but if it is false, just continue executing the next instruction in memory.
-If you care about performance, you should know that this jumping around (called branching) can carry some overhead. The CPU has highly specialized circuits the attempt to predict with branch of code the execution will follow. For many situations these circuits are very successful in making the predictions, and thus the cost of branching is effectively zero. But in some situations it is very difficult for the branch predictor to accurately predict which branch is going to be taken, and in these situations highly optimized code tries to avoid if statements in clever ways.
+If you care about performance, you should know that this jumping around (called branching) can carry some overhead. The CPU has highly specialized circuits that attempt to predict which branch of code the execution will follow. For many situations these circuits are very successful in making the predictions, and thus the cost of branching is effectively zero. But in some situations it is very difficult for the branch predictor to accurately predict which branch is going to be taken, and in these situations highly optimized code tries to avoid if statements in clever ways.
 If you are just starting out, you don't need to worry about all this.

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 == Using If Statements ==
 When a decision is made at an if statement in your program, two things happen:
 # A condition is evaluated
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 </source>
 An <code>if</code> statement is controlled by the value inside the parentheses <code>()</code>--only when it is true is your code executed.
+=== Else Statement ===
 But what if you want something to happen only if the condition is ''not'' true? Then you stick the <code>else</code> keyword after the <code>if</code> code block:
 <source>
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+}
 </source>
+=== Nesting ===
 You can even stick if conditions inside if conditions, this is called 'nesting':
 <source>
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+}
 </source>
+=== Chaining ===
 You can also chain multiple <code>if</code> statements together using the <code>else</code> keyword. The code above can be simplified and written as:
 <source>

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 == Other Tutorials ==
-http://www.cplusplus.com/doc/tutorial/control/
+* http://www.cplusplus.com/doc/tutorial/control/
-https://www.tutorialspoint.com/cplusplus/cpp_if_else_statement.htm
+* https://www.tutorialspoint.com/cplusplus/cpp_if_else_statement.htm
-https://www.cprogramming.com/tutorial/lesson2.html
+* https://www.cprogramming.com/tutorial/lesson2.html
-https://www.youtube.com/watch?v=qEgCT87KOfc&t=904s
+* https://www.youtube.com/watch?v=qEgCT87KOfc&t=904s
 == See Also ==
 * [[Beginner_C++_Game_Programming_Series#Topics_Covered|List of Beginner C++ Topics]]

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 == Planet Chili Tutorial Video ==
-[[Beginner C++ Game Programming Tutorial 3]]
+* [[Beginner C++ Game Programming Tutorial 3]]
 == Other Tutorials ==

← Older revision		Revision as of 13:22, 17 June 2018
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	== See Also ==		== See Also ==
−	[[Beginner_C++_Game_Programming_Series#Topics_Covered\|List of Beginner C++ Topics]]	+	* [[Beginner_C++_Game_Programming_Series#Topics_Covered\|List of Beginner C++ Topics]]

← Older revision		Revision as of 13:22, 17 June 2018
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	https://www.youtube.com/watch?v=qEgCT87KOfc&t=904s		https://www.youtube.com/watch?v=qEgCT87KOfc&t=904s
		+
		+	== See Also ==
		+	[[Beginner_C++_Game_Programming_Series#Topics_Covered\|List of Beginner C++ Topics]]

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 }</source>
-We use the <code>if</code> keyword followed by opening and closing parentheses <code>()</code> which contain the condition we want to evaluate. The condition is followed by block of code (surrounded by braces <code>{}</code>) that is executed if that condition evaluates to <code>true</code>.
+We use the <code>if</code> keyword followed by opening and closing parentheses <code>()</code> which contain the condition we want to evaluate. The condition is followed by a block of code (surrounded by braces <code>{}</code>) that is executed if that condition evaluates to <code>true</code>.
 <source>
 int PlayerHealth = 50;