# Golang Tutorial

This is a tutorial for Go, you'll need to have Go installed. You can do this by using the package manager on your computer or by downloading it from Go's website.

The only way to learn a programming language is to make a little project, no one ever learns a language just by reading a book or watching an hour long tutorial on YouTube.

This is why this guide will not teach you how to write Go code, but will suggest a couple of exercies you could do.

## Exercise 1: Project Euler

Project Euler is a site which contains a series of mathematical and computational problems which you can solve by writing a program in any language. It can be fun and challenging.

You have to register an account on the website so you can check your answers.

**Goal:** Write programs to solve the first 10 problems in Go.

## Exercise 2: Jamie is alive

In this exercise, we will do Jamie's coursework but in Go instead of ML/Python.

Since you have probably done them before, it should be simple especially when using the old code as reference.

### 1. Complex number arithmetic

Implement a `cadd`

and `cmult`

function in Go, you can use the `complex `

type. These two functions should return type complex.

For example:

```
comp := complex(1, -2) // this is 1+2i
fmt.Println(real(comp)) // this prints 1
```

### 2. Sequence arithmetic

Consider an integer array. Implement recursive functions `seqadd`

and `seqmult`

which takes in `[]int`

and returns `[]int`

.

For instance:

```
seqadd([]int{1,2,3},[]int{-1,2,2})
// returns []int{0,4,5}
```

*Note: Do not write error handling code.*

### 3. Matrices

Now the fun part! You should implement the following functions:

`isMatrix([][]int) bool`

: Whether the 2d array of integers represents a matrix (when the length of each row is equal).`matrixShape([][]int) (int, int)`

: Should return two integers, the number of columns and number of rows (in that order).`matrixAdd([][]int, [][]int) [][]int`

: Matrix addition, which is a simply a pointwise addition.**A challenge**`matrixMult([][]int, [][]int) [][]int`

: Matrix multiplication.

**Helpful links:**

- Matrix addition: https://www.mathsisfun.com/algebra/matrix-introduction.html
- Matrix multiplication: https://www.mathsisfun.com/algebra/matrix-introduction.html