[Logo]
Forums Register Login
2-D array of boolean
as a boolean variable can have only two values-true,false..so why exactly do we need an array of boolean values.???
I cooked this example up. I dont know if it will be of much use in the real-world. hth

There is a building of [3] floors , each having [4] rooms with just 1 bulb in each room. Bulb can be true/false. Now find out in which room light is on and tell that person to go to sleep.



output :



PS : The problem you mentioned doesnt really need an example. but it doesnt hurt to imagine. good luck and thanks for the practice i had due to you !
To make this a 3D problem, just add multiple bulbs to a room.

boolean b[3] is an array that CAN hold 3 references to boolean variables.

boolean b[3] [ ] is an array of 5 references to boolean arrays - its like : " b[3] {b1[], b2[],b2[]} " . The size of b1, b2, b3 can be different.
b[1] , b[2] , b[3] are a references to boolean arrays and NOT 3 booleans. b[1] [3] , that is a boolean. I guess this is where you have misunderstood.

boolean b[3] [ ] [ ] is like " b[3] {b1[ ] [ ], b2 [ ] [ ] , b3 [ ] [ ]} " etc...

 
Subhendu Dash wrote:as a boolean variable can have only two values-true,false..so why exactly do we need an array of boolean values.???

Your question is a bit strange. The fact that a boolean can only be true or false does not have anything to do with being able to create an array of boolean values.
(1 like)
you need an array (or better, you can USE an array) any time you need to remember more than one instance of a variable. I may have an array of booleans to hold whether a group of students have paid their dues. I need to recall a yes or not values for EACH student.
Wink, wink, nudge, nudge, say no more ... https://richsoil.com/cards



All times above are in ranch (not your local) time.
The current ranch time is
Nov 23, 2017 04:48:37.