[Solved] Identify the error in this bash snippet:name="John Doe" echo ${name:3-2} - Ans: Invalid substring syntax with arithmetic inside braces | Bash Scripting

Bash Scripting - String Operations

Identify the error in this bash snippet:

name="John Doe"
echo ${name:3-2}

AInvalid substring syntax with arithmetic inside braces

BVariable name is incorrect

CMissing quotes around variable

DNo error, outputs 'n Doe'

Step-by-Step Solution

Solution:

Step 1: Check substring syntax
Substring syntax ${var:start:length} does not support arithmetic like 3-2 inside braces.
Step 2: Understand bash does not evaluate expressions inside braces
Arithmetic must be done outside or using $(( )) syntax.
Final Answer:
Invalid substring syntax with arithmetic inside braces -> Option A
Quick Check:
Arithmetic inside ${} invalid [OK]

Quick Trick: Do math outside ${} using $(( )) in bash [OK]

Common Mistakes:

MISTAKES

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