# Machine Learning From scratch | Part 1. Scaler, And Vector

Hello Every One Lets start with the very basic prerequisit of machine learning I wont be taelling you the why and what of machine learning rather lets see some simple maths which can be usefull in our journey of ml

## Scaler And Vector

Two Statments

- I have Travelled 50Km
- I have travelled 50km in North-East direction

In first statment if you see we have only one value that is distance which i have travelled so it will be scaller (only one value)

In the second statment we have two things Distance and in which direction so this will be a vector (2 or more values)

In simple words one value is scaler and multiple values (dimentions) are vector

one more example

Lets say my temrature changes 2 unit

so here we know that temratture has changed by 2 unit and that only we know so it will be scaller

and my temprature increased 2 unit or decresed 2 unit

in this statment have 2 dementions temprature and directtion so this will be vector

There are plenty of scalar quantity examples, some of the common examples are:

- Mass
- Speed
- Distance
- Time
- Area
- Volume
- Density
- Temperature

Vector quantity examples are many, some of them are given below:

- Linear momentum
- Acceleration
- Displacement
- Momentum
- Angular velocity
- Force
- Electric field
- Polarization

Next : Vector Dot Products