Example 1:
a = [2, 3, 4];
b = a[0] + a[1]; //b holds the value 5. Notice that the index for the values in the array start at 0.
Example 2:
c = [2, 7, 8, 12];
d = c.length; //d holds the value 4 since there are 4 values in the array.
Example 3:
e = [ ];
e.push(4);
e.push(7);
e.push(8);
//e holds the values [4, 7, 8]. Notice push sends the value to the end of the array.
Example 4:
f = [3, 4, 5];
g = f[0] + f[f.length-1]; //g holds the value 8 since this is f[0] + f[2].
Example 5:
sum = 0;
h = [3, 11, 13];
for (i = 0; i < h.length; i++)
{
sum = sum + h[i];
}
//here sum holds the value 27 (the sum of 3, 11 and 13).