CSE 142

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Week 6

Write a method named printAverage that accepts a Scanner for the console as a parameter and 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 double, and do not round it. If the first number typed is negative, do not print an average.

An example call might look like ...

Scanner console = new Scanner(System.in);
printAverage(console);

And the output might look like ..

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

Write a method named hasAnOddDigit that returns whether any digit of an integer is odd. Your method should return true if the number has at least one odd digit and false if none of its digits are odd. 0, 2, 4, 6, and 8 are even digits and 1, 3, 5, 6, 9 are odd digits. You should not use String to solve this problem. Some example calls are below.

Write a method named isAllVowels that returns whether a String consists entirely of vowels (a, e, i, o, u)—case-insensitively. If every character of the String is a vowel, your method should return true. If any character of the String is a non-vowel, your method should return false. Your method should return true if passed the empty string, since it does not contain any non-vowel characters.

Below are some sample calls.

Call	Value Returned
`isAllVowels("eIEiO");`	`true`
`isAllVowels("oink");`	`false`