Unable to set default python version to python3 in ubuntu

Question

I was trying to set default python version to python3 in Ubuntu 16.04. By default it is python2 (2.7). I followed below steps :

Answer 1

At First Install python3 and pip3

sudo apt-get install python3 python3-pip

then in your terminal run

alias python=python3

Check the version of python in your machine.

python --version