Boolean and if statement confusion

[Bryce Wade]

Hey everyone,

i am learning to code in java and have come across a problem.
the thing is the program seems completely fine to me.
id like to know if you see any reason why this code will not print "true".

Thanks for any help you can provide this n00b.

public class tnt
{
    public static void main(String args[])
    {
        int m = -5;
        boolean tnt;
        if (m<0)
        tnt = true;
        tnt = false;
        System.out.print(tnt);
    }
}

[Christina Bremmerman]

Your If loop is setting it to true and then right after you are setting it to false.
Just remove the tnt=false line because that's what's resetting it back to false
or if you really want you could make the false into your else clause

[Sunni srivastav]

Christina Bremmerman wrote:Your If loop is setting it to true and then right after you are setting it to false.
Just remove the tnt=false line because that's what's resetting it back to false
or if you really want you could make the false into your else clause

Just writing the above in code so that it becomes clear to you...

public class tnt 
{ 
public static void main(String args[]) 
{ 
int m = -5; 
boolean tnt; 

if (m<0) 
tnt = true; 

//the below statement overwrites the "tnt" value
tnt = false; 
System.out.print(tnt); 
} 

If you want output based on whatever your if condition evaluates then make it as below

if (m<0) 
{
tnt = true; 
}
else
{
tnt = false; 
}

[Bryce Wade]

Thank you for your help Sunni with visualizing what christina had stated.

[Seetharaman Venkatasamy]

we can reduce the complexity as in

int m = -5;
boolean tnt = false;
if (m<0)
tnt = true;
System.out.print(tnt); 

[Seetharaman Venkatasamy]

and Welcome to JavaRanch Bryce Wade

[Joanne Neal]

Seetharaman Venkatasamy wrote:we can reduce the complexity as in

int m = -5;
boolean tnt = false;
if (m<0)
tnt = true;
System.out.print(tnt); 

Or even simpler

int m = -5;
boolean tnt = (m < 0);
System.out.print(tnt); 

[Venu Chakravorty]

A word of advice Bryce:
Braces make code more readable, use them.

public class tnt
{
    public static void main(String args[])
    {
        int m = -5;
        boolean tnt;
        if (m<0) {
            tnt = true;
        }
        tnt = false;
        System.out.print(tnt);
    }
}

Hope this helps.

[Manuel Petermann]

Christina Bremmerman wrote:Your If loop...

Sorry to correct you but if statements are no loops!
I totally agree with Venu that you should use braces in statements even when they aren't needed.

If you add a line of code later and you forget that you didn't use braces in the first place you will get weird behavior and maybe a difficult bug to find depending on code size.

[Christina Bremmerman]

Manuel Petermann wrote:

Christina Bremmerman wrote:Your If loop...

Sorry to correct you but if statements are no loops!
I totally agree with Venu that you should use braces in statements even when they aren't needed.

If you add a line of code later and you forget that you didn't use braces in the first place you will get weird behavior and maybe a difficult bug to find depending on code size.

Correction is fine...I'm a newb too and my weakness is definitely terminology...I actually looked at his post trying to see if I could figure out what was wrong with my own if statement because I am having similar issues, LoL