[Solved] What does the expression ${#var} do in a bash script? - Ans: It returns the length of the string stored in the variable var. | Bash Scripting

Bash Scripting - String Operations

What does the expression ${#var} do in a bash script?

AIt converts the variable <code>var</code> to uppercase.

BIt returns the value of the variable <code>var</code>.

CIt counts the number of words in the variable <code>var</code>.

DIt returns the length of the string stored in the variable <code>var</code>.

Step-by-Step Solution

Solution:

Step 1: Understand the syntax ${#var}
This syntax in bash returns the length of the string stored in the variable var.
Step 2: Differentiate from other operations
It does not return the value itself, count words, or change case. It specifically counts characters.
Final Answer:
It returns the length of the string stored in the variable var. -> Option D
Quick Check:
Length of string = ${#var} [OK]

Quick Trick: Remember: ${#var} counts characters in var [OK]

Common Mistakes:

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What does the expression ${#var} do in a bash script?