> "main" is not specified in the high-level language, but by the OS. You write some machine code, give it the name "main" and the OS jumps to that location mai

> "main" is not specified in the high-level language, but by the OS. You write some machine code, give it the name "main" and the OS jumps to that location main() is specified by C. The OS as such doesn't know or care about main. Headers in the binary executable specify where the OS should begin execution, and this is rarely in main.