Q. Why we need parallel programming languages?
The parallel programming languages are created for parallel computer environments. These are developed either by creating new languages (e.g. Occam) or by editing existing languages like (FORTRAN and C). Typically language extension scheme is preferred by nearly each computer design. This decreases compatibility problem and High-level parallel constructs were added to C as well as FORTRAN to make these languages suitable for parallel computers. As well these optimizing compilers are designed to automatically discover the parallelism in program code and convert code to parallel code.
In addition to development of languages and compilers for parallel programming a parallel programming environment must also have supporting tools for development and text editing of parallel programmes.