## Variables, Arithmetic operations and Functions in Matlab

In this tutorial I will explain to you how to use variables, perform basic arithmetic operations and usage of some common mathematical functions in Matlab. Lets start right away.

# Creating a simple variable

Creating a variable is very simple. A variable name, an “=” sign and a value. For example, in command window, you would write,

x = 100

Here, we defined a variable x to have a value of 100.

# Basic Arithmetic Operations

Addition, subtraction, multiplication and division is performed by using +, -, *, / operators respectively on a variable. This is shown below:

# Powers

We are going to give power to variables now. It is simple like:

>> x = 4

x =4

>> x^1000

ans =Inf

>> x^100

ans =1.6069e+60

# Squareroot

Root the numbers back to their squares using:

sqrt(x);

sqrt(16);

# Logarithmic Operations

This is done like:

log(105);

log10(105);

log10(pi);

log(-1);

# Trigonometric Ratios

You do it like a boss:

boss = pi;

sin(4*boss/3);

tan(boss*boss);

There are much more functions to get you started on your work in Matlab. But this is enough for this tutorial as I will slowly be advancing towards more advanced and specialized tutorials in the future.

Do comment if you have questions.