# Boolean exercise

• 02-09-2012, 09:01 PM
Sanna.1
Boolean exercise
hi every one

I have a exercise when i going to use boolean.

Im need to do 3 intergervaribals var1 var2 var3 and then i get same claim im going to get in to it like one of it is: The number var1 is evenly divisible by 7.

i figuer out that i can use samthing like this.
boolean sv = (var1%7 == 0);
System.out.println(sv);
i know how to do the boolean and look if its true or not but i dont know how to use it when im going to get 3 diffrent intergervaribals

plz can anyone show my how you type this program so i can understand it. and its only a exercise so i dont need to show it to anyone its only for my self to learn, so its no real homework that
• 02-09-2012, 10:07 PM
j_arif123
Re: Boolean exercise

Code:

```class booleantest        {         public static void main(String args[])        {                 int var1 = 49;                 boolean sv = (var1 % 7 == 0);                 System.out.println("\n sv = " + sv);         } }```
The Output is :
sv = true

From this it is clear that relational operator == returns exactly the word true or false . For three variables such as var1,var2,var3 , the program will be :

Code:

```class booleantest        {         public static void main(String args[])        {                 int var1 = 49;                 int var2 = 50;                 int var3 = 14;                 boolean b1 = (var1 % 7 == 0); // true                 boolean b2 = (var2 % 7 == 0); // false                 boolean b3 = (var3 % 7 == 0); // true                                 if( b1 && b2 && b3)                        System.out.println("\n All the three variables are divisible by 7" );                 else                 System.out.println("\n one or two or all variables is or are [B]not[/B] divisible by 7" );                         } }```
&& is logical operator used to combine boolean expressions or terms. if any one of values is false , entire expression is evaluated as false.
• 02-09-2012, 10:30 PM
Sanna.1
Re: Boolean exercise
thx for the help know i only need to figuer it out when you type in the numbers in your self:P
• 02-10-2012, 04:25 PM
j_arif123
Re: Boolean exercise
Quote:

Originally Posted by Sanna.1
thx for the help know i only need to figuer it out when you type in the numbers in your self:P

what do you mean? i can not get you. Do you want to read values for the three variables from keyboard? or Please point it out clearly.
• 02-10-2012, 04:48 PM
Tolls
Re: Boolean exercise
Quote:

Originally Posted by j_arif123
From this it is clear that relational operator == returns exactly the word true or false .

No it doesn't.
It returns a boolean, not a word (which implies a String).
• 02-10-2012, 08:30 PM
j_arif123
Re: Boolean exercise
Thanks for pointing out this . i meant that values of a boolean type are true , false . I learnt that java has these two as keyword . Do you know the Number of bits occupied by a boolean type?