[Solved] Why is the return type of main() usually int in C programs? — Ans: To indicate program exit status to the operating system | C

C - Basics and Execution Environment

Why is the return type of main() usually int in C programs?

ATo print output on the screen

BTo indicate program exit status to the operating system

CTo declare global variables

DTo include header files

Step-by-Step Solution

Solution:

Step 1: Understand main() return type purpose
int return type allows main() to return an exit status code to the OS.
Step 2: Eliminate incorrect options
Printing output, declaring variables, and including headers are unrelated to return type.
Final Answer:
To indicate program exit status to the operating system -> Option B
Quick Check:
int main() return = exit status [OK]

Quick Trick: int main() returns exit code to OS [OK]

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