Difference between revisions of "Repetition - Iteration"
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| − | + | =Repetition= | |
Repetition is the use of a for loop to execute one piece of code over and over. | Repetition is the use of a for loop to execute one piece of code over and over. | ||
There are multiple ways to create a for loop though. These are: | There are multiple ways to create a for loop though. These are: | ||
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| + | '''While''' uses one condition that which if met, will repeat the code. | ||
<syntaxhighlight lang="csharp" line>while (true) | <syntaxhighlight lang="csharp" line>while (true) | ||
{ | { | ||
x ++; | x ++; | ||
}</syntaxhighlight> | }</syntaxhighlight> | ||
| − | + | ||
| + | '''For''' loops intialise a variable, check a condition and perform an action. This is done before each iteration. | ||
<syntaxhighlight lang="csharp" line>for (int i = 0; i <= 1000000; i++) | <syntaxhighlight lang="csharp" line>for (int i = 0; i <= 1000000; i++) | ||
{ | { | ||
console.WriteLine(i); | console.WriteLine(i); | ||
}</syntaxhighlight> | }</syntaxhighlight> | ||
| − | + | ||
| + | '''Do while''' is the same as a while, however it doesn't check until it has done one iteration. | ||
<syntaxhighlight lang="csharp" line>do | <syntaxhighlight lang="csharp" line>do | ||
{ | { | ||
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} | } | ||
while (true)</syntaxhighlight> | while (true)</syntaxhighlight> | ||
| − | + | ||
| + | '''Foreach''' loops can also be used to access array variables [http://compsci.duckdns.org/mediawiki/index.php/Arrays] | ||
<syntaxhighlight lang="csharp" line>foreach (int x in Arr) | <syntaxhighlight lang="csharp" line>foreach (int x in Arr) | ||
{ | { | ||
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}</syntaxhighlight> | }</syntaxhighlight> | ||
| − | + | =Iteration= | |
An iteration is the piece of code performed each time a loop runs. Iterations can be skipped by calling the "continue" function. | An iteration is the piece of code performed each time a loop runs. Iterations can be skipped by calling the "continue" function. | ||
Revision as of 14:16, 29 June 2018
Repetition
Repetition is the use of a for loop to execute one piece of code over and over. There are multiple ways to create a for loop though. These are:
While uses one condition that which if met, will repeat the code.
1 while (true)
2 {
3 x ++;
4 }
For loops intialise a variable, check a condition and perform an action. This is done before each iteration.
1 for (int i = 0; i <= 1000000; i++)
2 {
3 console.WriteLine(i);
4 }
Do while is the same as a while, however it doesn't check until it has done one iteration.
1 do
2 {
3 x ++;
4 }
5 while (true)
Foreach loops can also be used to access array variables [1]
1 foreach (int x in Arr)
2 {
3 Console.WriteLine(x);
4 }
Iteration
An iteration is the piece of code performed each time a loop runs. Iterations can be skipped by calling the "continue" function.
