Loop and Arrays

Question

Can I have 2 initializers, 2 conditions, 2 iterators?

for (initializer; condition; iterator){
    body
}

I am asking this because I want to compare 2 arrays

int[] v1 = new int[10];
int[] v2 = new int[10];

for(int i=0; int j=v2.Length; i<v1.Length; j>0; i++; j--)
{
     if(v1[i]==v2[j])
     {
        //do something
     }
}

yes - separate with a comma instead of semi-colon: for(int i=0, int j=v2.Length; i<v1.Length, j>0; i++, j--) — Andrew S
– Andrew S, Commented Oct 31, 2020 at 17:33
You could just use 1 variable though. if(v1[i]==v2[v2.Length - i]) or similar — gus
– gus, Commented Oct 31, 2020 at 17:35

adjan · Accepted Answer · 2020-10-31 17:47:20Z

2

Not exactly, you can declare and initialize multiple loop variables, but they need to have the same type. Further, you cant have multiple conditions, but you can combine them via logical operators:

for (int i = 0, j = 1; i < v1.Length && j > 0; i++, j++  )
{
    if (v1[i] == v2[j])
    {
        //do something
    }
}

what also works is to initialize earlier declared variables of different types:

int i; double j;
for ( i = 0, j = 1.5; ... )

edited Oct 31, 2020 at 17:47

answered Oct 31, 2020 at 17:36

adjan

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