Write a Bash script that defines a function called subtract that takes two numbers as arguments and prints their difference. Code: #!/bin/bash # Define the subtract function subtract() { local num1=$1 local num2=$2 local difference=$((num1 - num2)) echo "The difference between $num1...
This problem involves writing a Bash script that defines a function named "subtract()" to calculate and return the difference between two given numbers. The function should take two arguments, subtract the second number from the first, and return the result. Code: #!/bin/bash # Define the s...
weeks, months, or years date_sub DATESTRING NUM [dwmy] - subtract NUM days, weeks, months, or years days_between DATESTRING1 DATESTRING2 - compute difference (in days) between two dates get_date_x_years_after X DATESTRING - get the date X years after a date get_date_...
To restore the default appearance of our command prompt, we can open the .bashrc script with our favorite editor and delete the appended line. 13. Creating Complex Prompts As we have already seen, customizing the command prompt deals with shell variables, escape characters, and commands. This ...
Inside a script you can access any parameter that was passed at invocation time. You access them using$0,$1,$2and so on, depending on the position, where$0is the name of the command and incrementing the number the position of the parameter is incremented. After position 9 you need curly...
script1="add.sh" script2="subtract.sh" script3="multiply.sh" script4="/home/fahmida/code/divide.sh" source "$script1" bash $script2 50 20 echo "Enter the value of a" read a echo "Enter the value of b" read b eval bash $script3 $a $b exec $script4 30Output...
Some handy environment variables$0 :name of shell or shell script. $1, $2, $3, ... :positional parameters. $# :number of positional parameters. $? :most recent foreground pipeline exit status. $- :current options set for the shell. $$ :pid of the current shell (not subshell). $!
#subtract 20 from numeric variable ((result=$num-20)) #print numeric value echo$result Output: Example-7: Using global and local variables In the following script, one global variable n and two local variables n and m are used. When the function addition() is called then the value of ...
Mathematical Functions A math library is preloaded and the default scale has been configured if bc is run with the-l option. The scale set at the time of its call is used by the math functions to calculate their results. Here are some of the commonly used mathematical functions: ...
-h HOSTNAME hostname of db server for *-slow.log filename (can be wildcard), default is'*', i.e. match all -i NAME name of server instance (if using mysql.server startup script) -l don't subtract lock timefromtotal time