[Solved] Why does the expression $(( 5 / 2 )) in bash return 2 instead of 2.5? - Ans: Bash arithmetic expansion only supports integer math, truncating decimals | Bash Scripting

Bash Scripting - Quoting and Expansion

Why does the expression $(( 5 / 2 )) in bash return 2 instead of 2.5?

ABash uses floating point but echo truncates output

BDivision operator rounds up automatically

CThe expression is treated as a string, not math

DBash arithmetic expansion only supports integer math, truncating decimals

Step-by-Step Solution

Solution:

Step 1: Understand bash arithmetic limitations
Bash arithmetic expansion supports only integer calculations.
Step 2: Explain the result
Division truncates the decimal part, so 5 / 2 equals 2, not 2.5.
Final Answer:
Bash arithmetic expansion only supports integer math, truncating decimals -> Option D
Quick Check:
Integer-only math = Bash arithmetic expansion only supports integer math, truncating decimals [OK]

Quick Trick: Bash math truncates decimals, no float support in $(( )) [OK]

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Why does the expression $(( 5 / 2 )) in bash return 2 instead of 2.5?