Mastering Iterative Structures in Shell Scripting

for loops, while loops, and until loops

To help modularize and reuse shell script code

function_name() { commands }

To print the smaller of two arguments

To read user input from the command line

while loops, for loops, and until loops

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

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

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.

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