What is interpreter?

Answer 1

An interpreter is a program that reads code one line at a time, decides what that line is trying to do, and gives the appropriate output.
For example, if an interpreter read this:
print(“hello”);
Assuming that this is the correct syntax, here is what would happen:

Keyword: print
Parameters: “hello”

Output: hello

Then it goes on to repeat this process with the next line.

Answer 2

According to google:
1.

a person who interprets, especially one who translates speech orally or into sign language.

synonyms:translator, transcriber, transliterator, decipherer; More

2.

COMPUTING

a program that can analyse and execute a program line by line.

It's basically like code playground here on SoloLearn. It analyses each line of your code and does what the code says it should do.

Answer 3

It's also a pattern in OOP to handle syntax trees.