Difference between revisions of "Loops"
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|Introduction=Until now all your programs have been working from top to bottom. Imagine if you were to write a game to guess a secret number from 1 to 100. The entire program would consist of one hundred [[Control Structures#The If Statement|if statements]] to account for each turn to check and see if the number chosen is correct; a situation like this is where a loop will come in to play and reduce those one hundred statements into one. | |Introduction=Until now all your programs have been working from top to bottom. Imagine if you were to write a game to guess a secret number from 1 to 100. The entire program would consist of one hundred [[Control Structures#The If Statement|if statements]] to account for each turn to check and see if the number chosen is correct; a situation like this is where a loop will come in to play and reduce those one hundred statements into one. | ||
| − | A loop is a [[Control Structures|control structure]] that allows you to repeat the same sequence of code as long as a given [[test condition]] evaluates to true. Every passage through this sequence of code is called an ''iteration''. If you repeat the same sequence of code 20 times, then you have performed 20 iterations. | + | A loop is a [[Control Structures|control structure]] that allows you to repeat the same sequence of code as long as a given [[test condition]] evaluates to true. Remember that the test condition uses [[Java Fundamentals#Operators|operators]]. Every passage through this sequence of code is called an ''iteration''. If you repeat the same sequence of code 20 times, then you have performed 20 iterations. |
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==[[Looping]]== | ==[[Looping]]== | ||
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==[[While Loops]]== | ==[[While Loops]]== | ||
==[[Do-While Loops]]== | ==[[Do-While Loops]]== | ||
Latest revision as of 21:38, 8 December 2011
 Chapter 5Until now all your programs have been working from top to bottom. Imagine if you were to write a game to guess a secret number from 1 to 100. The entire program would consist of one hundred if statements to account for each turn to check and see if the number chosen is correct; a situation like this is where a loop will come in to play and reduce those one hundred statements into one. A loop is a control structure that allows you to repeat the same sequence of code as long as a given test condition evaluates to true. Remember that the test condition uses operators. Every passage through this sequence of code is called an iteration. If you repeat the same sequence of code 20 times, then you have performed 20 iterations. | ||
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| Write a Program a Day | Case Studies | |
Looping
While Loops
Do-While Loops
For Loops
Nested Loops
Scope
Infinite Loops
Multiple Control Statements
Running Totals and Sentinel Values
Review Questions and Exercises
| Chapter 4: Control Structures | Table of Contents | Chapter 6: User Defined Methods |
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