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This article mainly explains the "C++ there are obvious cyclic variables in why the for sentence is better than the while sentence", the content of the article is simple and clear, easy to learn and understand, now please follow the editor's train of thought slowly in depth, together to study and learn "C++ there are obvious cyclic variables in why the for sentence is better than the while sentence" it!

ES.72: for statements are better than while statements if there are obvious loop variables

Reason (reason)

Readability: the complete logic of the loop is visible "up front". The scope of the loop variable can be limited.

Readability: all the logic of the loop can be seen directly in the foreground. The scope of a loop variable can be limited to a loop.

Example (sample)

For (gsl::index I = 0; I < vec.size (); iTunes +) {

/ / do work

}

Example, bad (negative example)

Int I = 0

While (I < vec.size ()) {

/ / do work

ITunes +

}

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