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divinity
divinity wrote ...

2016/4/17

prime number divisible by 3

divinity divinity

2016/4/17

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hi how do you write a java program that print prime number that is divisible by 3.
danpost danpost

2016/4/17

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divinity wrote...
how do you write a java program that print prime number that is divisible by 3.
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System.out.println("3");
That should answer your question because any other number divisible by 3 cannot be prime because it is divisible by 3.
divinity divinity

2016/4/20

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hi how do you divide in java? the denominator must be divisible by the numerator. what i meant is like this 24/4. in java how do i do that. how do i do it by using the modulus.
danpost danpost

2016/4/20

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If using 'int' type values, anything from 24 through 27 divided by 4 will result in a returned value of 6. The modulus operator, '%' will return the remainder of the operation; so, 24%4= 0, 25%4=1, 26%4=2 and 27%4=3.
divinity divinity

2016/4/20

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okay now, how do you do it without using the modulus
danpost danpost

2016/4/20

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divinity wrote...
okay now, how do you do it without using the modulus
I guess you would have to do it the long way:
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int numA = 27;
int numB = 4;
 
int mod = numA;
while (numA >= numB) mod -= numB;
 
System.out.println("The remainder after dividing "+numA+" by "+numB+" is "+mod);
I did not put any checks to ensure that both values were positive.
divinity divinity

2016/4/20

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hi danpost that is not working, i tried it and am getting an empty output. nothing is outputting. blank output
danpost danpost

2016/4/20

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divinity wrote...
hi danpost that is not working, i tried it and am getting an empty output. nothing is outputting. blank output
Where did you try it? Show the code you used (method and all).
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