Write a function that receives two numerical values of number and the required calculation symbol, operation symbol and then return the result based on the type of calculation.
Write a function that receives a string value in lowercase English letters, then the function converts the text into uppercase.
Write a function that receives an array of integer and returns the largest even number among those numbers in the form of an integer numeric value.
Write a function that receives a string value in English, and the function returns the same value, but after converting all its small letters into uppercase and converting all its capital letters into lowercase letters.
Write a function that receives a specified number of seconds with an integer numeric value and returns a string value in the form of a digital clock 00:00:00
Write a function that receives specific letters or numbers in string format and convert it to ASCII encoding and then return the value in integer numeric format