How many types of programming languages I need to know?

Answer 1

PRITAM "Programming languages are tools, nothing much"

So how many languages I need to know depends upon on how many things/applications I want to build.

Example:
You need an axe to cut/chope a wood(so, axe is the programming language here and cutting/chopping a wood is the application)

Another example, you need a hammer for nailing a nail(so, hammer is the programming language here and nailing a nail is the application)

Now coming to programming example.
you need java/Kotlin for building an android app.

java/Kotlin is the tool here and android app is the application

Let's say you want to do machine learning, so now you'll need to select the best tool out of so many like JS, python, R etc... and in my opinion the best tool would be Python.

Sometime you'll need to use a combination of different tools just like building a house(saw, hammer, axe etc).
for example, for making Websites you'll need different tools like html, JS, css, php, mysql etc.

Answer 2

Thanks for your valuable suggestion