Write a program in java

1. Addition of loop counter: You enter a number . I will add up the numbers between 1 and that number . (so , if you enter 6: 1+ 2 + 3 + 4 + 5 + 6 =21)

2. Factorial of counter: You enter a number. I will display the numbers that are multiplied in a factorial. (So, if you enter 3: 3 * 2 * 1 = 6 )

3. Strings: You enter a string and a character. I will count the number of matching characters in the string.

As in string: Martha Washington and character a: Answer: a appears 3 times