1/ a function returns odd with odd numbers and even with even number
2/ a function that sum an array of numbers only the positive number it ignores negative once
3/ sum numbers except the great and less once and if array is impty return 0
4/ doing a function that do the same job as "repeatStr()" it repeats string by giving it a number and string you wanna repeat
5/ convert number to reversed array of digits
6/...10/ you will see description of challenge in his file
i' m trying to do 10 challenges for bigenners