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print_average

Language/Type: Python input loops cumulative algorithms

Write a function named print_average that repeatedly prompts the user for numbers. Once any number less than zero is typed, the average of all non-negative numbers typed is displayed. Display the average as a real number, and do not round it. The following is one example log of execution for your function: 

Type a number: 7
Type a number: 4
Type a number: 16
Type a number: -4
Average was 9.0

If the first number typed is negative, do not print an average. For example: 

Type a number: -2
Function: Write a Python function as described, not a complete program.

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