declare - it is used to declare shell variables and functions, set their attributes and display their values

To declare a variable $ declare var $ var=65

To display the options and attributes of each variable name $ declare -p

To declare a variable with a string value of all capital letters $ declare -l strvar="WELCOME TO ILUGC"

To declare a variable with a string value of all small letters $ declare -u strvar="welcome to ilugc"

regards, T.Dhanasekar