What is a Interpretre

An interpreter is a translator program for a high level programming language that translates and runs the program at the same time. The program that is being interpreted is still in its original source language, the way the programmer wrote it. The interpreter translates one program statement into machine language and then causes the machine language to be executed. It then translates the next statement and so on, until the program is finished.
Interpreted programs run more slowly than their compiler counterparts. However, it is convenient to write a program using an interpreter.