# How to create a two-dimensional array from two one-dimensional arrays and perform calculations

I have a question on how to create a two dimensional array from two one dimensional arrays and perform calculations. In my case, the program that I have written has two syntax errors when I try to create a two dimensional array from the two one dimensional arrays using two `for` loops. The first for loop has a syntax error saying `non-static variable angle cannot be referenced from a static context` and the second for loop has a syntax error saying `package velocity does not exist` but I already defined it above. How can I fix this? Any help will be greatly appreciated. Below is my code:

``````public class Catapult {

int velociy[] = {45, 67, 77, 89, 90, 56, 100};

public static void calculations(int velocity[], int angle[]){
for(int i = 0; i < velocity.length; i++){
double answer = velocity[i] * Math.sin(angle[i]) / 9.8;
}
}

public static void display(){
for(int i = 0; i < angle.length; i++){
for(int j = 0; j < velocity.length; j++){
System.out.println(// how can I make a two dimensional array
// from two one dimensional arrays?
);
}
System.out.println();
}
}
}
```
```

I notice that your array of velocities and your array of angles don't have the same length. So I assume you are actually trying to combine every velocity with every angle in your calculation, to give a 2D result; instead of just combining them pairwise. This is how I would do it.

``````public static void main(String[] args) {
int[] velocity = {45, 67, 77, 89, 90, 56, 100};