Write a method that returns anumber, given an uppercase letter, as follows:public static int getNumber(char uppercaseLetter)Write a test program that prompts the user to enter a phone number as a string. The inputnumber may contain letters. The program translates a letter (uppercase or lowercase)to a digit and leaves all other characters intact. Here are sample runs of the program:   Enter a string: 1-800-Flowers ↵Enter1-800-3569377

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Math class and its different methods

Java math class consists of arithmetic math methods that performs basic numeric operations such as finding the maximum or minimum of two values, rounding values, logarithmic functions, square root, and trigonometric functions, etc. The Math library functions can be accessed using the header Java.lang.Math. These math methods under Java math class are for our convenience.