How do I convert code into executable software?

Answer 1

Well I see you tagged all the web languages so
I assume you want to convert web to native:
If you want to build an executable for all platforms
Use React Native
Here are some features
React Native is UI-Focused
React Native apps sport a highly responsive interface.
 React Native and the Native environment of the device reduces load times and gives a smoother feel of your app.
If you want to build mobile apps only
Use Phone Gap
Here are some features
Features, Advantages and Disadvantages of PhoneGap
Strong and Robust Backed- PhoneGap has a robust backend system that tremendously speeds up the development process and reduces developer's efforts. ...
Open Source- ...
Flexibility- ...
Compatible on all the platforms- ...
Ease of Development- ...
Two fold benefits- ...
Tapping into the device's hardware
https://facebook.github.io/react-native/
https://phonegap.com/

Answer 2

Use android studio with java