Subtract single digit array elements

Question

hi all
i have created 2 int array both have the same size of 15... i don't have to fill it all in ...
so it can be half of the array filt in with number and the rest will be zero's by default...
so each element can have only one digit
example:
int[] arr1 = {1,2,3,4,6,8,5}
int[] arr2 ={1,0,0,2,3,2}
int[] subtract = new int[15];
now i want to subtract arr2 from arr1 and add the resault in subtract array
this array can also hold one digit only in each of its elements.
the size of this new array can be 15 and more...
what i did is i pushed all elements value of arr1 and arr2 to the end of the arrays, and i start add the result also at the end of subtract array
so the will look like this :
arr1 = {0,0,0,0,0,0,0,0,1,2,3,4,6,8,5}
arr2 = {0,0,0,0,0,0,0,0,0,1,0,0,2,3,2}
it works fine but i have 2 problems
1- it works fine only if the result will be (+value) value greater than or equal 0sorry i don't know the english name of this .. that mean it works when arr1 - arr2 >=0
i couldn't find a way to give the result if result value less than zero ,,
2-as you see i push all number to the end of the array how can i
remove the zero's from the left side of first number when i print them ??
here is the method i used to subtract
public static int[] subtractIntArrays(int[]array1 , int[] array2)
          int total=0;
          int remainder =0;
          int []arraySubtract = new int[6];
          for(int i=(array1.length-1); i>=0; i--)
               if ((array1[i]- remainder) - array2<0 )
                    total =(10+array1[i]- remainder) - array2[i];
                    arraySubtract[i]=total;
                    remainder=1;
               else
                    total =(array1[i]- remainder) - array2[i];
                    arraySubtract[i]=total;
                    remainder = 0;
          return arraySubtract;

Answer 1

>
it works fine but i have 2 problems
1- it works fine only if the result will be (+value)
value greater than or equal 0sorry i don't know the
english name of this .. that mean it works when arr1
- arr2 >=0Your english looks fine to me.
What value do you expect for 2 - 8 ?
You might want to look at java.lang.Math.abs(int)
i couldn't find a way to give the result if result
value less than zero ,,
2-as you see i push all number to the end of the
array how can i
remove the zero's from the left side of first number
when i print them ??Check if the value is zero using an if statement and only print if it is not-zero.
If you really want just to the left (zeros in the middle are ok) then use a boolean to signal that you found the first non-zero value and use that it your if statement as well.