Return values (return and echo) in Bash Scripting - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to return the value 5 from the function.

Bash Scripting

my_func() {
  [1] 5
}
my_func

Drag options to blanks, or click blank then click option'

Aprint

Becho

Creturn

Dexit

Attempts:

3 left

💡 Hint

Common Mistakes

Using echo instead of return to send back a value.

Using exit inside the function which stops the whole script.

The return command in bash functions sets the exit status (an integer between 0 and 255). Here, return 5 returns the value 5 as the function's exit status.

2fill in blank

medium

Complete the code to print the string 'Hello' from the function.

Bash Scripting

greet() {
  [1] "Hello"
}
greet

Drag options to blanks, or click blank then click option'

Aecho

Bprint

Cexit

Dreturn

Attempts:

3 left

💡 Hint

Common Mistakes

Using return to try to print text.

Using print which is not a bash command.

The echo command prints text to the terminal. Here, echo "Hello" prints the string 'Hello' when the function is called.

3fill in blank

hard

Fix the error in the function to correctly return the exit status 3.

Bash Scripting

check_status() {
  [1] 3
}
check_status
status=$?
echo $status

Drag options to blanks, or click blank then click option'

Aecho

Bprint

Cexit

Dreturn

Attempts:

3 left

💡 Hint

Common Mistakes

Using echo instead of return to set exit status.

Using exit which terminates the script.

To set the function's exit status, use return. Using echo prints the number but does not set the exit status. The variable $? captures the exit status.

4fill in blank

hard

Fill both blanks to create a function that prints 'Done' and returns exit status 0.

Bash Scripting

finish() {
  [1] "Done"
  [2] 0
}
finish
status=$?
echo $status

Drag options to blanks, or click blank then click option'

Aecho

Bexit

Creturn

Dprint

Attempts:

3 left

💡 Hint

Common Mistakes

Using exit instead of return which stops the script.

Using print which is not a bash command.

The function uses echo to print 'Done' and return 0 to set the exit status to 0, indicating success.

5fill in blank

hard

Fill all three blanks to create a function that prints the argument, returns 1 if argument is 'fail', else returns 0.

Bash Scripting

result() {
  [1] "$1"
  if [[ "$1" == "fail" ]]; then
    [2] 1
  else
    [3] 0
  fi
}
result "$1"
exit_status=$?
echo $exit_status

Drag options to blanks, or click blank then click option'

Aecho

Breturn

Cexit

Dprint

Attempts:

3 left

💡 Hint

Common Mistakes

Using exit inside the function which stops the whole script.

Using print which is not a bash command.

Using echo instead of return to set exit status.

The function prints the argument with echo. It uses return 1 if the argument is 'fail', otherwise return 0. This sets the function's exit status correctly.