If I learn 1 programming language, is it easier to learn other languages?

Answer 1

I would say yes because you start to think more like a programmer (logically speaking).

You may experience different levels of advantage depending on how similar / different the other programming languages are compared to each other. For example, if you start with an object-oriented language, it might be easier to learn others of the same type but hard to learn a functional language. On the other hand, some languages are similar enough to each other that it would be easy to mix up the syntaxes.

Answer 2

Yes.
All the languages will have almost the same conditional statements and loops and other things like functions etc.
Once you learn a language amd understand how things work..it is pretty much same in all the languages.Only the syntax changes.

Answer 3

of course!

Answer 4

Yes if you know the foundations of a given language like:

loops
for loops
else
elif
if else
while statements
functions
classes
etc..

Then learning other language's will be easier all programming languages have these in one way or another just different syntax.

Its not about mastering a language but the foundations.

Goodluck.