In the above Java program to count all vowels in a string we use built-in function count() and with the help of a counter variable, calculate each and every vowel. Sample Output: Input the string: welcome To the world of java Number of Vowels in the string: 9

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In the above Java program to print a right angles triangle from a number, we have use nested loop where i is row and j is column in that row. Sample Output: Input number of rows : 10 1 12 123 1234 12345 123456 1234567 12345678 123456789 12345678910

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