Java Question for cycle

[Star-Dust]

I found myself such a cycle to translate into B4X. And I can't understand what the final condition is for which the cycle stops. Usually it's a boolean condition now I find the negation of an integer, so what does that mean?

int i = 0;
for (; !i; i = 0 + i + 1) {
    System.out.println(i); 
    // other
}

PS the problem is that the condition is not a boolean and I don't understand how it is satisfied

 

[Lucas Siqueira]

I found myself such a cycle to translate into B4X. And I can't understand what the final condition is for which the cycle stops. Usually it's a boolean condition now I find the negation of an integer, so what does that mean?

int i = 0;
for (; !i; i = 0 + i + 1) {
    System.out.println(i);  
}

For i = 1 To 10
   Log(i) 'Will print 1 to 10 (inclusive).
Next

 

[Star-Dust]

For i = 1 To 10
   Log(i) 'Will print 1 to 10 (inclusive).
Next

Forgive me, but this java cycle doesn't seem to stop at 10, it would

int i = 1; for (; i==10; i = 0 + i + 1) { System.out.println(i); }

the condition to be satisfied is !i not i==10

 

[JordiCP]

!i is equivalent, in some languages, to i==0
In other words, the for loop will only execute while i==0 (or until i<>0)
So if I'm not mistaken, the example code of the first post should only loop once.

In this case, the equivalent code would be

for i=0 to 0
...
Next

(although some 'for' loops with more complex statements fit better into a Do..while..loop structure)

 

[Star-Dust]

!i is equivalent, in some languages, to i==0
In other words, the for loop will only execute while i==0 (or until i<>0)
So if I'm not mistaken, the example code of the first post should only loop once.

In this case, the equivalent code would be

for i=0 to 0
...
Next

(although some 'for' loops with more complex statements fit better into a Do..while..loop structure)

Thanks @JprdiCP,

After researching on the web I suspected exactly what you told me.
I did some experiments but in java but the compiler doesn't accept it and yet it is definitely a working code.

Thanks again

 

[JordiCP]

Yes, it's strange
Perhaps it is an untested sample code written by someone who also programs in C/C++, and mistakenly mixed C and Java syntax

 

[Star-Dust]

I have the source and the compiled version. I'm sure it works even with the compiled version.

 

[RodM]

int i = 1; for (; i==10; i = 0 + i + 1) { System.out.println(i); }

The condition specified above seems to be like "Loop WHILE i==10". The second parameter of a for loop must be True for the loop to execute and, in that case, the initial value of i is 1 and the loop should never run this way.

Sorry if I am wrong, I'm not an expert in Java

 

[LucaMs]

Eventualmente la colpa è tutta di Perplexity, non mia
If that's not accurate, it's all Perplexity's fault, not mine

 

[Star-Dust]

Solved..thank's

Yes, it's strange
Perhaps it is an untested sample code written by someone who also programs in C/C++, and mistakenly mixed C and Java syntax