This document contains code for several Java programs that perform various calculations and operations: 1. A FiveNumberSum program that declares integer variables, sums 5 numbers, and prints the result. 2. An ArithmeticTest program that performs arithmetic operations (addition, subtraction, multiplication, division, remainder) on two integers, prints the results, and demonstrates increment/decrement operators. 3. Additional programs include ones for a triangle class/tester, decimal-binary conversions, trigonometric functions, and determining if a number is odd or even.

1. importjava.util.Scanner;
classFactorial {
publicstaticvoidmain(Stringargs[]) {
intn, c, fact = 1;
System.out.println("Enteranintegertocalculate it'sfactorial");
Scannerin= newScanner(System.in);
n = in.nextInt();
if (n< 0) {
System.out.println("Numbershouldbe non-negative.");
} else {
for(c = 1; c <= n; c++) {
fact = fact * c;
}
System.out.println("Factorial of "+ n + " is= " + fact);
}
}
}
//OUT PUTS
//run:

2. //Enteran integertocalculate it'sfactorial
//3
//Factorial of 3 is = 6
//BUILD SUCCESSFUL (total time:13 seconds
importjava.util.Scanner;
classsequence1{
publicstaticvoidmain(String[] args) {
sequence1fs=newsequence1();
fs.fibonacci();
}
publicvoidfibonacci(){
intnumb1= 1;
intnumb2= 1;
inttemp= 0;
@SuppressWarnings("resource")
Scannerinput= newScanner(System.in);
System.out.println("HowManyTerms?(Up To n)");
intx = input.nextInt();
x = x - 2;
System.out.println(numb1);
System.out.println(numb2);

3. for(inti = 0; i < x; i++) {
System.out.println(numb1+numb2 + " ");
temp= numb1;
numb1= numb2;
numb2= temp+ numb2;
}
}
}
importjava.util.Scanner;
classBinaryGCD {
publicstaticvoidmain(String[] args) {
Scannerinput= newScanner(System.in);
System.out.println("Pleaseenterthe firstinteger:");
intb = input.nextInt();
System.out.println("Pleaseenterthe secondinteger:");
intd = input.nextInt();
System.out.println("The GCDof " + b + " and" + d + " is " + getGcd(b,d) + ".");
}
publicstaticintgetGcd(intb,int d) {
intgcd = 1;

4. if (b> d) {
for(inti = d;i >= 1; i--) {
if (b % i == 0 && d % i == 0) {
return i;
}
}
} else {
for(intj = b; j >= 1; j--) {
if (b % j == 0 && d % j == 0) {
return j;
}
}
}
returngcd;
}
}
//OUT PUTS
// run:
//Please enterthe firstinteger:
//6
//Please enterthe secondinteger:
//4
//The GCD of 6 and4 is2.

5. //BUILD SUCCESSFUL (total time:9 seconds)
importjava.util.Scanner;
publicclassODDEVEN {
}
classOddOrEven{
publicstaticvoidmain(Stringargs[]) {
intx;
System.out.println("Enteranintegertocheckif itis oddor even");
Scannerin= newScanner(System.in);
x = in.nextInt();
if (x % 2 == 0) {
System.out.println("Youenteredanevennumber.");
} else {
System.out.println("Youenteredanoddnumber.");
}
}
}
//OUTPUT
// run:
//Enteran integertocheckif it isodd or even
//3

6. //Youenteredanoddnumber.
//BUILD SUCCESSFUL (total time:8 seconds
importjava.util.Scanner;
classTrignometricFunctionsDemo{
publicstaticvoidmain(String[] args) {
//Create a Scannerobjectwhichwill read
//valuesfromthe console whichuserenters
Scannerscanner= newScanner(System.in);
//Gettinginputfromuserfrom the console
System.out.println("Entervalueof angle indegrees");
//CallingnextDouble methodof scannerfor
//takinga double value fromuserandstoring
//it indegreesvariable
double degrees=scanner.nextDouble();
System.out.println("Letscalculatethe sine,cosineandtanof angle ...");
//In orderto calculate sine ,cosine andtan of angle we
//use the Math classthree static methodsbyname as :
//1. Math.sin(a) -- Sine of a
//2. Math.cos(a) -- Cosine of a

7. //3. Math.tan(a) -- Tangentof a
double sineOfAngle =Math.sin(degrees);
double cosOfAngle=Math.cos(degrees);
double tanOfAngle=Math.tan(degrees);
System.out.println();
System.out.println("The Sine of "+ degrees+" degreesis: "
+ sineOfAngle);
System.out.println("The Cosine of "+ degrees+ " degreesis:"
+ cosOfAngle);
System.out.println("The Tangentof "+ degrees+ " degreesis:"
+ tanOfAngle);
System.out.println();
System.out.println("Lets calculatethe sec,cosecandcot of angle ...");
//In orderto calculate sec,cosecand cot of angle we
//justinverse the value of sin,cos and tan calculatedabove :
//4. Secof a -- 1 / Sine of a
//5. Cosecof a -- 1/ Cosine of a
//6. Cotof a -- 1 / Tangentof a
double secOfAngle =1 / Math.sin(degrees);
double cosecOfAngle =1 / Math.cos(degrees);
double cotOfAngle =1 / Math.tan(degrees);

8. System.out.println("nTheSecof " + degrees+ " degreesis:"
+ secOfAngle);
System.out.println("The Cosecof "+ degrees+" degreesis:"
+ cosecOfAngle);
System.out.println("The Cotangentof "+ degrees+" degreesis: "
+ cotOfAngle);
}
}
// OUTPUT
//run:
//Entervalue of angle indegrees
//30
//Letscalculate the sine,cosine andtanof angle ...
//
//The Sine of 30.0 degreesis: -0.9880316240928618
//The Cosine of 30.0 degreesis:0.15425144988758405
//The Tangentof 30.0 degreesis: -6.405331196646276
//
//Letscalculate the sec,cosecand cot of angle ...
//
//The Secof 30.0 degreesis: -1.012113353070178
//The Cosecof 30.0 degreesis:6.482921234962678
//The Cotangentof 30.0 degreesis: -0.15611995216165922
//BUILD SUCCESSFUL (total time:9 seconds)

9. importjava.util.Scanner;
classdecimal {
}
classDecimalBinaryProgram{
publicstaticvoidmain(String[] args) {
Scannerin= newScanner(System.in);
while (true){
System.out.println("Enterintegerindecimal form(or#to quit):");
Strings1 = in.nextLine();
if ("#".equalsIgnoreCase(s1.trim())) {
break;
}
System.out.println(decimalToBinary(s1));
System.out.println("Enterintegerinbinaryform (or# to quit):");
Strings2 = in.nextLine();
if ("#".equalsIgnoreCase(s2.trim())) {
break;
}
System.out.println(binaryToDecimal(s2));
}

10. }
private staticStringdecimalToBinary(Strings) {
intn = Integer.parseInt(s,10);
StringBuildersb= newStringBuilder();
if (n== 0) {
return"0";
}
intd = 0;
while (n>0) {
d = n % 2;
n /= 2;
sb.append(d);
}
sb= sb.reverse();
returnsb.toString();
}
private staticStringbinaryToDecimal(Strings) {
intdegree =1;
intn = 0;
for(intk = s.length() - 1; k >= 0; k--) {
n += degree *(s.charAt(k) - '0');
degree *= 2;

11. }
returnn + "";
}
}
//OUTPUT
//run:
//Enterintegerindecimal form(or# to quit):
//2
//10
//Enterintegerinbinaryform (or# to quit):
//3
//3
//Enterintegerindecimal form(or# to quit):
//3
//11
//Enterintegerinbinaryform (or# to quit):
//4
//4
//Enterintegerindecimal form(or# to quit):
//4
//100
//Enterintegerinbinaryform (or# to quit):
//5
//5
//Enterintegerindecimal form(or# to quit):

12. //5
//101
importjava.io.*;
publicclassbetriangle {
}
// CSC108 Chapter4, Question19
// Name: Iam Me StudentID:555555555
// Tutor: AndriaHunter Prof:KenJackson
//
// ProgramDescription:Thisprogramusesthe Triangle class
// to create a triangle object. Itthenusesthe is_right,
// is_scalene,is_isosceles,andis_equilateral methods
// to testwhat type of triangle itis.
// The Triangle classcontainsthree variablestostore the length
// of each side of the triange,andmethodsthatcan be usedtodetermine
// determineif atriange isright,scalene,isoscelese,andequilateral.
classTriangle {
// Storesthe lengthof eachside of the Triangle object.
private intside1,side2,side3;
// Constructorto initialize the sidesof the triangle.
publicTriangle(ints1,ints2, ints3) {

13. side1= s1;
side2= s2;
side3= s3;
}
// Methodto testfor a right-angledtriangle.
publicbooleanis_right() {
if (((side1* side1) == ((side2*side2) + (side3* side3)))
|| ((side2*side2) == ((side1*side1) + (side3* side3)))
|| ((side3*side3) == ((side1*side1) + (side2* side2)))) {
returntrue;
} else {
returnfalse;
}
}
// Methodto testfor a scalene triangle.
publicbooleanis_scalene() {
if ((side1!=side2) && (side1!=side3) && (side2!= side3)) {
returntrue;
} else {
returnfalse;
}
}

14. // Methodto testfor an isoscelestriangle.
publicbooleanis_isosceles() {
if (((side1== side2) && (side1!=side3))
|| ((side1== side3) &&(side1!= side2))
|| ((side2== side3) &&(side2!= side1))) {
returntrue;
} else {
returnfalse;
}
}
// Methodto testfor an equilateral triangle.
publicbooleanis_equilateral(){
if ((side1==side2) && (side1== side3)) {
returntrue;
} else {
returnfalse;
}
}
}
// The Test_Triangle classcontainsone mainmethodwhere program
// executionstarts. Itallowsthe usertocreate triangle objects
// byenteringthe dimensionsforthe three sidesof the triangle,
// andit determinesthe type of eachtriangle. The usertypes'n'

15. // whentheywanttoquit the program(mustenterat least1 triangle).
classTest_Triangle {
// Main methodthatallowsthe userto enterthe dimentionsfor
// three sidesof a triangle. These dimensionsare thenusedto
// create a Triangle object,andthisobjectistestedtodetermine
// whattype of triangle itis.
publicstaticvoidmain(String[] args) throwsIOException{
//Declare stdinsodata can be readfrom input.
DataInputStreamstdin=newDataInputStream(System.in);
//loopexitswhenthe userresponse is"n"
Stringuser_response="y";
while (!user_response.equals("n")) {
//Ask userfor 3 dimensionsof triangle.
System.out.println("nEnterside1length:");
intside1= Integer.parseInt(stdin.readLine());
System.out.println("Enterside2length:");
intside2= Integer.parseInt(stdin.readLine());
System.out.println("Enterside3length:");
intside3= Integer.parseInt(stdin.readLine());

16. //Nowuse these valuestocreate aTriangle object.
Triangle tri = newTriangle(side1,side2,side3);
//Determine whatkindof triangle itis.
System.out.println("nIstriangle right-angle?"+ tri.is_right());
System.out.println("Istriangle scalene? " + tri.is_scalene());
System.out.println("Istriangle isosceles? "
+ tri.is_isosceles());
System.out.println("Istriangle equilateral?"
+ tri.is_equilateral());
//Ask userif theywantto continue.
System.out.println("nDoyouwanttoexamine more triangles?");
System.out.println("(type'y'foryesor 'n' for no)");
user_response =stdin.readLine();
}
}
}
//OUTPUT
// run:
//
//Enterside1length:
//3
//Enterside2length:
//2

17. //Enterside3length:
//1
//
//Istriangle right-angle?false
//Istriangle scalene? true
//Istriangle isosceles? false
//Istriangle equilateral?false
//
//Doyou wantto examine more triangles?
//(type 'y'for yesor 'n' for no)
//y
//
//Enterside1length:
//7
//Enterside2length:
//9
//Enterside3length:
//8
//
//Istriangle right-angle?false
//Istriangle scalene? true
//Istriangle isosceles? false
//Istriangle equilateral?false
//
//Doyou wantto examine more triangles?

18. //(type 'y'for yesor 'n' for no)
/*
* Sum five numbers and print the result
*/
public class FiveNumberSum { // Save as "FiveNumberSum.java"
public static void main(String[] args) {
int number1 = 11; // Declare 5 int variables to hold 5 integers
int number2 = 22;
int number3 = 33;
int number4 = 44;
int number5 = 55;
int sum; // Declare an int variable called sum to hold the sum
sum = number1 + number2 + number3 + number4 + number5;
System.out.print("The sum is "); // Print a descriptive string
System.out.println(sum); // Print the value stored in sum
}
}
publicclassARTIMATIC{
}
classArithmeticTest{ // Save as "ArithmeticTest.java"
publicstaticvoidmain(String[] args) {
intnumber1= 98; // Declare anint variable number1andinitializeitto98
intnumber2= 5; //Declare an intvariable number2andinitialize itto5
intsum,difference,product,quotient,remainder; //Declare five intvariablestoholdresults
//PerformarithmeticOperations
sum= number1+ number2;

19. difference =number1- number2;
product= number1* number2;
quotient=number1/ number2;
remainder=number1% number2;
//Printresults
System.out.print("The sum,difference,product,quotientandremainderof "); //Printdescription
System.out.print(number1); //Printthe value of the variable
System.out.print("and");
System.out.print(number2);
System.out.print("are ");
System.out.print(sum);
System.out.print(",");
System.out.print(difference);
System.out.print(",");
System.out.print(product);
System.out.print(",");
System.out.print(quotient);
System.out.print(",and");
System.out.println(remainder);
++number1; // Incrementthe value storedinthe variable "number1"by1
//Same as "number1= number1+ 1"
--number2; //Decrementthe value storedinthe variable"number2"by1
//Same as "number2= number2- 1"

20. System.out.println("number1afterincrementis"+ number1); //Printdescriptionandvariable
System.out.println("number2afterdecrementis"+ number2);
quotient=number1/ number2;
System.out.println("The newquotientof "+ number1+ " and " + number2
+ " is" + quotient);
}
}
//OUT PUT
// run:
//The sum,difference,product,quotientandremainderof 98 and 5
//are 103, 93, 490, 19, and 3
//number1afterincrementis99
//number2afterdecrementis4
//The newquotientof 99 and 4 is24
//BUILD SUCCESSFUL (total time:1 second)