1.initialze one integer array. 2.need to know actual size array. 3.calculate expected total with formula n*(n*1)/2. 4.calculate actual today adding each element in the array. 5.Deducted expected and ...

///Given an array arr [] of size N-1 with integers in the range of [1, N], the task is to find the missing number from the first N integers.

How to Assign Random Numbers to an Array in Java. Java has a "Random" class that lets you generate a random number you use to implement calculations in your Java source code.