how to specify the version of python to be installed in virtualenv code example

Example 1: creating venv python3

# CREATE FOLDER FOR A PROJECT
mkdir project_folder
cd project_folder

# CREATE VIRTUAL ENVIRONMENT
python3.7 -m venv myvenv 
# or alternativelly
virtualenv myvenv --python=python3.7

# ACTIVATE VIRTUAL ENVIRONMENT
source myvenv/bin/activate

Example 2: virtualenv specify python version

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