Chapter 16. PC #8. Sum of Numbers (page 1073) Write a method that accepts an integer argument and returns the sum of all the integers from 1 up to the number passed as an argument. For example, if 50 is passed as an argument, the method will return the sum of 1, 2, 3, 4, . . . 50. Use recursion to calculate the sum. Demonstrate the method in a program. The program should ask the user to enter a number, which is then used to display the sum. if the user enters -1, then exit the program.

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