foreach Loop Properties

This lesson explains the different properties of foreach loop.

Counter for containers #

The automatic counter in foreach is provided only when iterating over arrays. There are two options for other containers:

  • Taking advantage of std.range.enumerate

  • Defining and incrementing a counter variable explicitly:

size_t i = 0;

foreach (element; container) {
    // ...

A counter variable is needed when counting a specific condition as well. For example, the following code only counts the values that are divisible by 10 and displays the count with each occurrence of such an element.

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