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# I don't understand booleans very well. Can someone help me?

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23rd Sep 2017, 9:18 PM
Beck_hee
4 ответов
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Booleans are a way programs talk to us. We usually use booleans on IF statements: if(true) then print "hello" So if the Boolean is true then the program should print "hello" In Java, C#, php and C++ the Boolean oporators are as follows: Let's say 'number' equals 4. if(number == 4) == is an equals oporator if(number <= 4) <= Smaller-Equal oporator So if number is smaller than 4 or = to for then it's true if(number >= 4) >= Bigger-Equal oporator So if number is bigger or equals to 4 then it's true if(number < 4) < smaller oporator So if number is smaller than 4 then it's true if(number > 4) > bigger oporator So if number is bigger than 4 then it's true if(number != 4) != Not Equal oporator So the ! inverts the value that it would be without the ! ex: if(!false) if not false (which makes it true) then execute code. I hope this clears things up a bit
23rd Sep 2017, 10:03 PM
Limitless
+ 3
Boolean type variables has two values. True or false. True equals to 1. False equals to 0. For example: boolean_1=true boolean_2=false print(boolean_1) //it will give to you "true", shortly it will give 1. print(boolean_2) ////it will give to you "false", shortly it will give 0. When we come to compare to bool variables, we look at the same numbers.For example: //I take variable of example of above. print(boolean_1==boolean_2) //It will give 0 or false to us. Because we checked that 1==0 ?? As everybody can know that they are different from each other. print(boolean_1!=boolean_2) //Now we are checking that Is 1 not equal to 0? And we know that yes they are not equal to each other. It means we will get true or 1. When we came to variable compares , there are not 0 or 1 any more.For example: variable_1="ship" print(variable_1=="ship") //We are asking to computer Is variable_1 equal to "ship", and the computer is saying yes they are equal to each other. Because variable_1 has "ship" value. I don't know can I tell to you what is the boolean. But probably you will learn something if you will try to understand.
23rd Sep 2017, 10:05 PM
Yusuf
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thanks a lot
23rd Sep 2017, 10:06 PM
Beck_hee
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A boolean is a type with only two common value : true, false. General concept : I'am a human. True because I'm speaking to you. In coding : if (I'm speaking to you): I'm human. The if statement evaluate the condition with the following operators : < > == != <= >= or with predeterminate functions to return a boolean. 1<2 -> true 1>2 -> false Beware of type specifications like String in java wich can't compare two value with == because of character definition. Use functions like equals().
23rd Sep 2017, 11:22 PM
Kevin Durillon