Bash Shell Script Function Examples

In Bash, you can iterate over an array in several ways. Here are some examples:

1. Iterate over an array using a for loop:
   my_array=(apple banana cherry)
for i in "${my_array[@]}"
do
echo "$i"
done


   This will loop through each element in the my_array array and print it to the console.

2. Iterate over an array using a while loop and the shift command:
   my_array=(apple banana cherry)
while [ "${#my_array[@]}" -gt 0 ]
do
echo "${my_array[0]}"
shift
done


   This will loop through each element in the my_array array and print it to the console using the shift command to remove the first element of the array in each iteration.

3. Iterate over an array using a for loop with an index variable:
   my_array=(apple banana cherry)
for (( i=0; i<${#my_array[@]}; i++ ))
do
echo "${my_array[$i]}"
done


   This will loop through each element in the my_array array using an index variable i, and print the corresponding element to the console using array indexing.

4. Iterate over an array using a for loop and the printf command:
   my_array=(apple banana cherry)
for element in "${my_array[@]}"
do
printf "%s\n" "$element"
done


   This will loop through each element in the my_array array and print it to the console using the printf command with the %s format specifier to print a string.

These are just a few examples of how to iterate over an array in Bash. You can choose the method that works best for your specific use case.