2. Use a method (or methods) from the Java Math class to calculate the minimum value of four int variables a, b, c, d and assign that minimum to a variable called smallest. You can write as many lines of Java as you wish - it may be possible to do it with just one! You do not need to write a full program. You do not need to declare smallest. You do not need to declare or give values to a, b, c, d. Write your code here: 3. Assume you are writing code inside a Java method that has two formal parameters, x and y, both of which are type double. The method is to return an int. Write the java statement(s) to calculate and return the int value of x/y. You do not need to write the whole method. Write your code here: 2.2 - java code variables given . what is value after this code run ? 2.3 - 2.2 - java string variables given . what is value after this code run ?

2 - int smallest = Math.min(Math.min(Math.min(a,b),c),d); Here we are using minimum method which is present in the Java Math class. It calculates the minimum of 2 numbers at a time. For e.g. Math.min(a,b) will give minimum number by comparing ‘a’ and ‘b’. In the above code, we are using Math.min() function 3 times. The innermost Math.min(a,b) will give us minimum number from ‘a’ and ‘b’. Then we compare this number with another number ‘c’. At this point Math.min() will return the minimum number among Math.min(a,b) and ‘c’. The finally we again use Math.min() to compare the minimum number so far and compare it with ‘d’ and it will return the minimum number among Math.min(Math.min(a,b),c) and ‘d’ so at the end, we will get the smallest number among ‘a’, ‘b’, ‘c’ and ‘d’. 3 - int ret = (int)(x/y); return ret; The first line will declare an integer variable named “ret” and it is initialized to the value (x/y) which is explicitly type-casted to Integer which is very important since both x and y are doubles so (x/y) is also a double. double needs a type-cast to Integer before it is returned. 2.2 - x = 8 + 10; x = 18; x = 18.0; 8 is an Integer number and 10 is also an Integer number. The addition is 8+10 = 18 but since the variable is of double type, the final result becomes of ‘double’ type hence 18 becomes 18.0 y = 9/4; y = 2; y = 2.0; Here also 9 and 4 are Integer variables. The arithmetic is done on integer variables so 9/4 in integer arithmetic is 2. Then the 2 is type-casted to ‘double’ type because y is of double type. z = 23.0/2; z = 23.0/2.0; z = 11.5; Here 2 is an Integer but 23.0 is of ‘double’ so arithmetic cannot happen. For the arithmetic operation, all the numbers are converted to the highest data -type present (which is ‘double’ in this case) so the 2 is type-casted to ‘double’ type and becomes 2.0. Then the arithmetic divide happens and the result is stored in z. Value of x: 18.0 Value of y: 2.0 Value of z: 11.5 2.3 - s = “Hello COMP170” + “\n” + “Ace the exam!”; Here the string s is divided into 3 parts. The first part is “Hello COMP170” which will be printed as it is. The second part is “\n” which is the newline character which moves the cursor to next line. The third part is “Ace the exam!” which will also be printed as it is on the same line. t = 50 + 50 + “ Good Score!”; Here the t string has numbers as well as string portion. This string can be clubbed to easily understand what is going on. t = (50 + 50) + “ Good Score!”; Here in the bracket, numeric addition is taking place and then finally an append with the string is happening. t = 100 + “ Good Score!”; t = “100 Good Score!” Now once the addition is done, the 100 number will be type-casted to ‘String’ datatype and then merged with the second portion of the string. u = “Not so good: “ + (100 - 45); This string is also similar to the above string (t) but here the parenthesis is already given. So it will be evaluated first. u = “Not so good: “ + 55 u = “Not so good: 55” After the bracket is evaluated, the number (100-45) = 55 is type-casted to ‘String’ data-type and then appended with the first portion of the string. Value of s: “Hello COMP170 Ace the exam!” Value of t: “100 Good Score!” Value of u: “Not so good: 55” (double quotes can be ignored to mimic actual output of the program)

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2. Use a method (or methods) from the Java Math class to calculate the minimum value of four int variables a, b, c, d and assign that minimum to a variable called smallest. You can write as many lines of Java as you wish - it may be possible to do it with just one! You do not need to write a full program. You do not ne