Nim Sequences

Introduction to Nim Sequences

Nim sequences are a powerful feature in Nim, offering dynamic array capabilities. Unlike traditional arrays, sequences in Nim can change size, making them ideal for situations where the number of elements isn't known in advance. This flexibility is achieved through the add method, while the len function allows you to easily retrieve the number of elements.

Creating a Sequence

To create a sequence in Nim, you can use the seq keyword followed by the type of elements the sequence will hold. The following example demonstrates how to declare a sequence of integers:

Adding Elements to a Sequence

Adding elements to a sequence is simple with the add procedure. This procedure appends an element to the end of the sequence. Here's how you can add numbers to the sequence we created:

Accessing Sequence Length

The length of a sequence can be obtained using the len function. This returns the number of elements currently stored in the sequence. For example:

Iterating Over a Sequence

Sequences can be easily iterated over using a for loop. This allows you to perform operations on each element within the sequence:

Modifying Elements in a Sequence

Just like arrays, the elements in a sequence can be accessed and modified using their index positions. Here's an example where we modify the first element:

Summary

Nim sequences provide a flexible and powerful way to work with dynamic arrays. Their ability to grow and shrink as needed, combined with easy element access and modification, make them a versatile choice for many programming tasks. By using add and len, you can efficiently manage collections of data.