Manipulating what rand() returns

• Since rand() returns unsigned integers in a large range, we often have to manipulate the return value to suit our purposes

• Suppose we want only random numbers in the range from 0 to 5

  • num = rand () % 6

• How about 1 to 6?

  • num = 1 + rand( ) % 6;

• How about 5 to 20?

  • num = 5 + rand ( ) % 16;

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