What is Compiler ?

Definition of Compiler :

1. A computer program which reads source code and outputs assembly code or executable code is called compiler.
2. A program that translates software written in source code into instructions that a computer can understand Software used to translate the text that a programmer writes into a format the CPU can use.
3. A piece of software that takes third-generation language code and translates it into a specific assembly code. Compilers can be quite complicated pieces of software.

Compiler Overview :

Consider process of Executing Simple C Language Code –

We have opened C Code editor and wrote simple C Program , Whenever we try to compile code and try to execute code our code is given to the compiler.

int main()
{
printf("Hello");
return(0);
}

Now our main intention is to convert program into lower level language which can be read by Machine. Compiler have different phases , and program undergoes through these 6 phases. After Passing through all the compilation Phases our code is converted into the machine level language code which can be read by machine.