Answers for "python 3."

python version

python ––version

download python

Step 1: Download Python newest version from

 https://www.python.org/downloads/

Step 2:Install Python
Step 3:Download Pycharm Community free version
Step 4:Install and open Pycharm
Step 5:Write print("Hello New World")
  //Hurray you are about to start python

Python3

Input: nums = [-1,0,3,5,9,12], target = 9
Output: 4
Explanation: 9 exists in nums and its index is 4