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Array: How do you group multiple values (of the same type) together

Array: How do you group multiple values (of the same type) together. // Array optimizations int []ar = new int [] {2, 4, 6}; // equivalent to int []ar = new int[3]; ar[0] = 2; ar[1] = 4; ar[2] = 6; // common mistakes. THIS DOES NOT // MAKE A COPY. ar and br point to

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Array: How do you group multiple values (of the same type) together

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  1. Array: How do you group multiple values (of the same type) together // Array optimizations int []ar = new int [] {2, 4, 6}; // equivalent to int []ar = new int[3];ar[0] = 2; ar[1] = 4; ar[2] = 6; // common mistakes. THIS DOES NOT // MAKE A COPY. ar and br point to // the exact same array structure int []br = ar; // the array which is jointly// pointed to by ar and br has now // changed. br[3] = 19; int [ ] ar; define a variable that refers to an array of int values After the statement above, what is the value of ar? ar null instantiate contiguous array of six possible int values ar = newint [6]; ar 0 1 2 3 4 5 ar [0] is the leftmost value ar [5] is the rightmost value An array can be traversed easily using a while statement. // INPUT Scanner sc = new Scanner (System.in); int []p = new int[3]; System.out.println ("Enter x, y, z values for point"); int i = 0; while (i < p.length) { p[i] = sc.nextInt(); i++; // ADVANCE } // array is now populated with p[0] .. p[2] CS2102 Handout: arrays

  2. a b h = 1 Write program to read in a set of10 numbers, whose int values represent f(x) over the range 0..9Use the trapezoid rule to compute Where a=0 and b=9. For example,the area below is 56.5   Write From Scratch!!!!! CS2102 Handout: arrays

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