You want to create a bash function sum that takes two numbers and prints their sum. Which function definition correctly does this?

hard🚀 Application Q15 of 15

Bash Scripting - Functions

You want to create a bash function sum that takes two numbers and prints their sum. Which function definition correctly does this?

Afunction sum { echo $1 + $2; }

Bsum() { echo $1 + $2; }

Csum() { echo $(($1 + $2)); }

Dsum() { echo $1 $2; }

Step-by-Step Solution

Solution:

Step 1: Understand arithmetic in bash functions
To add numbers, use arithmetic expansion $(()) inside echo.
Step 2: Evaluate each option
sum() { echo $(($1 + $2)); } correctly sums $1 and $2 using $(($1 + $2)). Options A and B print strings with plus sign, not sum. sum() { echo $1 $2; } prints numbers without adding.
Final Answer:
sum() { echo $(($1 + $2)); } -> Option C
Quick Check:
Use $(()) for arithmetic in bash functions [OK]

Quick Trick: Use $(()) to perform math inside bash functions [OK]

Common Mistakes:

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