What is an interpreter?

Answer 1

https://www.google.com.co/url?sa=t&source=web&rct=j&url=https://es.m.wikipedia.org/wiki/Int%25C3%25A9rprete_(inform%25C3%25A1tica)&ved=0ahUKEwjtoqy2_KPOAhWLFR4KHcQMAVQQFgghMAI&usg=AFQjCNEt4kNNXpg3oA5KAHX34f8e6P1EaQ&sig2=QsxJIvA7LcH9iTJYLloM4Q

Answer 2

interpreter is machine translation program which convert high level language in machine language
... and it convert program into machine language line by line
whereas compiler is also a language translation program which convert complete source code into machine code in a single step and prints list of error on the screen if there any in program

Answer 3

Interpreter converts High level Lang to Machine language (0s and 1s) that system understands

Answer 4

then what is the difference between compiler and interpreter ?

Answer 5

why do we need to have Interpreter in java while we have Java compiler then?