for_loop

for loops

for and range

• The 'for in' construct can be used to iterate through an Iterator.
• One of the easiest ways to create an iterator is to use the range notation a..b.
• This yields values from a (inclusive) to b (exclusive) in steps of one.

for and iterators

• The 'for in' construct is able to interact with an Iterator in several ways.
• As discussed in the section on the Iterator trait, by default the for loop will apply the 'into_iter' function to the collection.
• However, this is not the only means of converting collections into iterators.

into_iter, iter and iter_mut all handle the conversion of a collection into an iterator in different ways, by providing different views on the data within.

• iter - This borrows each element of the collection through each iteration.Thus leaving the collection untouched and available for reuse after the loop.

• into_iter - This consumes the collection so that on each iteration the exact data is provided.
• Once the collection has been consumed it is no longer available for reuse as it has been 'moved' within the loop.

• iter_mut - This mutably borrows each element of the collection, allowing for the collection to be modified in place.