foreach Loop Properties

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) {
    // ...
    ++i; 
}

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.