while循环条件说明

Question

I have the following code with a while loop in it, However, I am not sure what one part of the while loops does.

    int a=nums[i];
    while(i+1<nums.length&&(nums[i+1]-nums[i])==1)
    {
        i++;
    }

I have a nums array and need to create a summary range of it. Can you please explain what the parameters of the while loop mean?

Answer 1

There is only one parameter or expression to a while loop: the condition that keeps the loop running if it evaluates to true or ends the loop if it evaluates to false . https://docs.oracle.com/javase/tutorial/java/nutsandbolts/while .

Given that in the body of the loop, i is being incremented, the code would be better served with a for loop. https://docs.oracle.com/javase/tutorial/java/nutsandbolts/for.html

The code has a compound condition, both of which must be true for the body of the loop to be executed. Both must be true since the boolean AND operator && is used.

The first condition checks that an OutOfBounds error does not occur by checking that i+1 does not exceed the array nums length and in fact is at most one less the length. The second condition checks that the following element is exactly 1 greater than the current element.

Hope this helps!

Answer 2

1) While index + 1 is less than the nums array length (to prevent OutOfBoundsException for next condition)

2) And next element of the array minus the current element of the array equal to one

Answer 3

In this while loop there are two conditions connected with && operator. so both condition s have to be fullfill. In first condition check weather index i+1 is less then to your array size and second depends upon perticular value of index i and i+1 .loop will be continue till both condition satisfied and index will be increase by 1. As soon as one of those condition will be false loop will be terminate. . You can also use for loop instead of while...it's quite easy to summerise arraylist. for( int i=0;i<nums.lenght;i++){ nums[i];}