how to create a virtual env in python 3 specific version code example

Example 1: how to make a virtual environment python 3

#create the venv
python -m venv name_virtual_env
    #or
python3 -m venv name_virtual_env

#activate venv
    #linux:
source name_virtual_env/bin/activate

    #windows
name_virtual_env\Scripts\activate

Example 2: virtualenv specify python version

virtualenv --python=/usr/bin/python2.6 <path/to/new/virtualenv/>