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Cplusplus programming has another powerful feature regarding the use of the template classes, which

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is a standard template library.

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S.

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T.

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L.

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So it's a set of class templates to provide all functions that are commonly used in manipulating various

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data structures.

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So there are four components that build the STL, the that they are first, they are algorithms, then

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there are containers.

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Iterators.

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And functions.

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Here are the algorithms.

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Containers, iterators and functions.

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So now let's look at these components.

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Mergers.

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So algorithms here, let me take this.

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So algorithms here are used on a range of elements such as sorting and searching.

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So the sorting algorithm is used to arrange the elements so both in ascending and descending order.

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So the searching algorithm is used to look for specific value from ranges of elements.

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Also we have the containers here.

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The containers are used to store objects of data.

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So the common container that is widely used is vector.

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So the vector is similar to an array, except it has the ability to resize itself automatically when

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an element is inserted or deleted.

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So we also have the iterators here.

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Iterators are used to work upon a sequence of values.

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So each container has its own iterator.

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For instance, there are begin.

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Uh, or here.

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This is the function begin function.

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And here.

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We also have the rent, which you will learn all about them.

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This is also our rent here.

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So they are the iterator functions and you will learn about them in this section.

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We also have the functions.

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Lastly here, let's actually delete this and drive on the function here.

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So the functions.

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Functions.

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So functions here are used to overload the existing function.

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So the instance of this component is called the Functor func.

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Functor or function object.

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So the functor is defined as a pointer of function where we can parameterize the existing function.

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So we are not building any code in this lecture since we just need to know that the STL is a powerful

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library in C plus plus and that it exists fortunately.

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So we are going to discuss the STL deeper in the next lectures.