While loop is executing one time more as expected

Question

public class fibonacci
{
    public static void main(String[] args)
    {
        int a=0,b=1,c=2;
        while(a<4000000)
        {
            a=b;
            b=c;
            c=a+b;
            System.out.println(a);
        }
    }   
}

Trying to print Fibonacci series less than 400000, but it is printing 5702887 as well.

Answer 1

Rearrange the printing and the checking, so that both act on the same value

int a=1,b=1,c=2;
while(a<4000000)
{
    System.out.println(a);
    a=b;
    b=c;
    c=a+b;        
}

This outputs the fibonacci sequene, with two times "1" at the start.
If you want "1, 2, 3..." use

int a=1,b=2,c=3;

Answer 2

Fibonacci series start from 1. look at this . I gave solution for your code. You set a=b after check a<4000000 . then you need to check with b.

int a=0,b=1,c=2;
    while(b<4000000)
    {
        a=b;
        b=c;
        c=a+b;
        System.out.println(a);
    }

Answer 3

您的代码很好，您所需要做的就是在计算下一个数字之前放入打印语句， 因为3524578 <5702887