{"id":260,"date":"2023-06-13T20:10:55","date_gmt":"2023-06-13T20:10:55","guid":{"rendered":"https:\/\/learnlearn.uk\/edexcel-igcse-computer-science\/?page_id=260"},"modified":"2023-06-13T20:28:42","modified_gmt":"2023-06-13T20:28:42","slug":"definite-iteration-for-loops","status":"publish","type":"page","link":"https:\/\/learnlearn.uk\/edexcel-igcse-computer-science\/definite-iteration-for-loops\/","title":{"rendered":"Definite Iteration (For Loops)"},"content":{"rendered":"
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Definite Iteration<\/h2>\n
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Definite Iteration (for loops)<\/h3>\n

Definite iteration, also known as a definite loop, is used when you know the exact number of iterations or the range over which you want to iterate. It involves iterating a specific number of times or over a predefined range of values. A definite loop is\u00a0 a loop that is definitely going to end.<\/em><\/p>\n

Definite iteration is commonly implemented using “for” loops.<\/p>\n

\"Definitely<\/p>\n

 <\/p>\n\n<\/div>

Index based for loops<\/h2>\n
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Index-based for loops<\/h3>\n

An index-based for loop iterates over a collection using the indices of the elements. It involves iterating over a range of indices and accessing the elements of the collection using the indices.<\/p>\n

Here’s an example of an index-based for loop in Python:<\/p>\n

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fruits =<\/span> [\"apple\"<\/span>, \"banana\"<\/span>, \"cherry\"<\/span>]\r\nfor<\/span> i in<\/span> range<\/span>(len<\/span>(fruits)):\r\n    print<\/span>(fruits[i])\r\n<\/pre>\n<\/div>\n
Output:<\/p>\n
apple\r\n\r\nbanana\r\n\r\ncherry<\/pre>\n
In this example, the for loop iterates over the range of indices (0<\/code>, 1<\/code>, 2<\/code>) of the fruits<\/code> list. The loop variable i<\/code> represents the index, and the elements of the list are accessed using the indices (fruits[i]<\/code>).<\/p>\n
Great for:<\/strong><\/p>\n