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Mastering Iterative Structures in Shell Scripting

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Mastering Iterative Structures in Shell Scripting

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Questions and Answers

What are the three types of iterative loops available in shell scripting?

while loops, do-while loops, and for-each loops

for loops, while loops, and until loops (correct)

for loops, do-while loops, and until loops

while loops, do-until loops, and for loops

What is the purpose of using functions in shell scripting?

To create complex data structures

To help modularize and reuse shell script code (correct)

To customize the shell environment

To improve shell script performance

What is the syntax for defining a function in shell scripting?

function_name() commands

function() name { commands }

function_name { commands }

function_name() { commands } (correct)

What is the purpose of the Min function in the provided example?

To print the smaller of two arguments Signup and view all the answers

What is the purpose of the read command in the provided examples?

To read user input from the command line Signup and view all the answers

What are the three mechanisms available for iteration in a shell script?

while loops, for loops, and until loops Signup and view all the answers

Provide an example of using a while loop to create a specified number of directories in a shell script.

read -p “Enter the number of directories to be created: ” numDir while [[ $numDir > 0 ]] do read -p “Enter the name of the directory: ” dirName mkdir $dirName if [[ $? = 1 ]] ; then echo “Directory creation failed” fi ((numDir--)) done Signup and view all the answers

How can functions help modularize and reuse shell script code?

Functions allow you to define a set of commands that can be called multiple times within a script, promoting code reuse and modularity. Signup and view all the answers

What is the syntax for defining a function in a shell script?

The first line specifies the function name followed by an empty set of parentheses, with the remainder of the function definition enclosed in { and } braces. Signup and view all the answers

What is the purpose of the Min function in the given example, and how is it called?

The Min function is used to determine the smaller of two numbers, and is called by providing the two numbers as arguments after the function name, separated by a space. For example: Min $N1 $N2 Signup and view all the answers