Bash Scripting - Variables
What will this script output?
var=5 var=$((var + 3)) echo $var
What will this script output?
medium📝 Command Output Q5 of 15
Step-by-Step Solution
Solution:
Step 1: Understand arithmetic expansion
$((var + 3)) calculates the sum of var and 3, which is 5 + 3 = 8.Step 2: Assign and print the new value
var is updated to 8, so echo prints 8.Final Answer:
8 -> Option DQuick Check:
Arithmetic expansion updates variable = D [OK]
Quick Trick: Use $(( )) for math in variables [OK]
Common Mistakes:
MISTAKES- Printing expression as string
- Not using $(( )) for math
- Expecting error from arithmetic
Master "Variables" in Bash Scripting
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