[Solved] Why should custom exit codes in bash scripts be less than 256? - Ans: Because exit codes are stored as 8-bit values and wrap modulo 256 | Bash Scripting

Bash Scripting - Error Handling

Why should custom exit codes in bash scripts be less than 256?

ABecause exit codes must be prime numbers

BBecause exit codes are stored as 8-bit values and wrap modulo 256

CBecause codes above 256 cause the script to crash

DBecause bash only accepts codes from 0 to 100

Step-by-Step Solution

Solution:

Step 1: Understand exit code storage
Exit codes are stored as 8-bit unsigned integers, so max is 255.
Step 2: Explain wrapping behavior
Codes above 255 wrap around modulo 256, so 256 becomes 0, 257 becomes 1, etc.
Final Answer:
Because exit codes are stored as 8-bit values and wrap modulo 256 -> Option B
Quick Check:
Exit codes wrap modulo 256 [OK]

Quick Trick: Exit codes wrap modulo 256 due to 8-bit storage [OK]

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