In the echo "profile-$num-$name" line of a shell script, the variable $num seems to not be expanding during execution. Which of the following notations ensures the value is expanded?

The correct answer is D. echo "profile-${num}-$name". Using ${num} ensures correct variable expansion, especially when variables are adjacent to other characters or hyphens. This prevents ambiguity and guarantees $num is properly expanded within the string.

Automation, Orchestration, and Scripting

Question

Options

Aecho "profile-$(num)-$name"
Becho 'profile-$num-$name'
Cecho "profile-'Snum'-$name"
Decho "profile-${num}-$name"

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(56 responses)

A
4% (2)
B
14% (8)
C
9% (5)
D
73% (41)

Explanation

Using ${num} ensures correct variable expansion, especially when variables are adjacent to other characters or hyphens. This prevents ambiguity and guarantees $num is properly expanded within the string.

Topics

#shell scripting#variable expansion#bash syntax#string interpolation

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