Question

• In this exercise, you will create a script called if_then_else.sh that uses an IF THEN ELSE statement.
• The if_then_else.sh script will
• Use one command line argument, which will be a number between 1 and 10
• Assign the value of the first argument to a local variable called NUM. HINT: Look at line 5 in the example screenshot for arguments.sh
• Use one IF THEN ELSE statement to compare the value of NUM
• If the number is less than 5, display the message "The number is less than 5"
• If the number is 5 or greater, display the message "The number is 5 or greater"
• When running
• Here are some hints
• Watching the video about IF THEN ELSE/ELIF Statement may be helpful
• The IF THEN ELSE statement has the form

If [ $NUM   operator   number ]

then

            echo "<message>"

else

            echo "<message>"

fi

• There must be a space after each element to avoid syntax error messages; i.e. there must be a space after the bracket, $NUM, operator and number
• Decide which integer operator to use. Look at the slide "Integer Operators"
• Decide what the value of number should be.
• Decide which message should go where

Answer 1

Program code to copy:-

# Assign the value of the first argument to a local variable called NUM
NUM=$1
#compare the value of NUM with 5 using -ge operator(means greater than and equal to)
if [ $NUM -ge 5 ]
then
    echo "The number is 5 or greater"

else
    echo "The number is less than 5"
fi

Screenshot of script:-

Screenshot of output:-

$sh if_then_else.sh 4

$sh if_then_else.sh 7