Mainframe, MVS and zOS Discussion

Hi,

I am learning the assembler. In that I've seen using START 0. What is need of START 0? Instead of '0' can we use any other numerics?

The HLASM Language Reference manual in the HLASM bookshelf has a discussion of the START instruction. If you are learning assembler and have not already bookmarked the location of this manual, you need to do so immediately. You should also bookmark the location of the Principles of Operation (POP) manual as well as you will be using it, too.