getenv : getenv « stdlib.h « C Tutorial

1. C Tutorial
2. stdlib.h
3. getenv

If a call is made to getenv() with an argument that does not match any of the environment data, a null pointer is returned.

#include <stdlib.h>
#include <stdio.h>

int main(void){
  printf("Path %s",getenv("PATH"));
}

Path C:\Java_Dev\sdk\djgpp\bin;