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import java.io.*; public class sumofdiagonals { public static void main(String args[]) throws IOException { InputStreamReader read = new InputStreamReader(System.in); BufferedReader br = new BufferedReader(read); int arr[][] = {{6,9,0,8},{3,2,1,5},{2,9,0,1},{4,1,9,6}}; int sum=0; for(int i=0;i<4;i++) { for(int j=0;j<4;j++) { if(i==j) sum+=arr[i][j]; } } System.out.println(sum); } } import java.io.*; public class namearranger { public static void main(String args[]) throws IOException { InputStreamReader read = new InputStreamReader(System.in); BufferedReader br = new BufferedReader(read); String arr[] = new String[5]; System.out.println("Enter 5 names."); for(int i=0;i<5;i++) { arr[i]=br.readLine(); } String temp=null; System.out.println("They will now be arranged alphabetically"); for(int i=0;i<5;i++) { for(int j=0;j<4;j++) { if((int)arr[j].charAt(0) > (int)arr[j+1].charAt(0)) { temp=arr[j]; arr[j]=arr[j+1]; arr[j+1]=temp; } } } for(int i=0;i<5;i++) { System.out.println(arr[i]); } } } import java.io.*; public class twominusfourplussixminuseight { public static void main(String args[]) { System.out.println("2-4+6-8...-20"); int a=1; int s=0; for(int i=2;i<=20;i+=2) { if(a%2!=0) s+=i; else s-=i; a++; System.out.println(a+ " " +i+ " " +s); } System.out.println(s); } } import java.io.*; public class position { public static void main(String args[]) throws IOException { InputStreamReader read = new InputStreamReader(System.in); BufferedReader br = new BufferedReader(read); System.out.println("Enter a sentence"); String a=br.readLine(); System.out.println("Enter word to be searched for"); String word = br.readLine(); int count=0; int pos=-1; pos = a.indexOf(word); while(pos>=0) { count++; pos = pos + word.length(); pos = a.indexOf(word,pos); } System.out.println("Number of times word occurs " +count); System.out.println(pos); } } Tax etc) import java.io.*; public class salary { String name, add, subsp; double phone, monsal, intax; void accept() throws IOException { InputStreamReader read = new InputStreamReader(System.in); BufferedReader br = new BufferedReader(read); System.out.println("Enter the teacher name"); name = br.readLine(); System.out.println("Enter the teacher's address"); add = br.readLine(); System.out.println("Enter the teacher's phone number"); phone = Integer.parseInt(br.readLine()); System.out.println("Enter the teacher's subject specialization"); subsp = br.readLine(); System.out.println("Enter the teacher's monthly salary"); monsal = Double.parseDouble(br.readLine()); } void compute() { if(monsal<175000) intax=0; else intax = (monsal-175000)*0.05; } void show() { System.out.println("TEACHER DETAILS--------\n\n"); System.out.println("NAME: " +name); System.out.println("ADDRESS: " +add); System.out.println("PHONE NUMBER: " +phone); System.out.println("SUBJECT SPECIALIZATION: " +subsp); System.out.println("MONTHLY SALARY: " +monsal); System.out.println("INCOME TAX: " +intax); } public static void main(String args[]) throws IOException { salary abc = new salary(); abc.accept(); abc.compute(); abc.show(); } } Dont just blindly copy paste this one-there's a small fuckup inside (salary must be multiplied by 12 to calculate income tax) import java.io.*; public class xupon258 { public static void main(String args[]) throws IOException { InputStreamReader read = new InputStreamReader(System.in); BufferedReader br = new BufferedReader(read); System.out.println("Enter a number"); double x=Double.parseDouble(br.readLine()); System.out.println("Now x/2+x/5+x/8"); double sum=0; for(int i=2;i<=8;i+=3) { sum+=x/i; System.out.println("After adding "+x+"/"+i+", sum till now is "+sum); } System.out.println("Final Sum is " +sum); } } Count Positive & Negative Numbers In List import java.io.*; public class countposneg { public static void main(String args[]) throws IOException { InputStreamReader read = new InputStreamReader(System.in); BufferedReader br = new BufferedReader(read); int arr[] = new int[575]; int j=2; System.out.println("Enter a list of numbers(terminates on entering 0)"); for(int i=0;j<3;i++) { arr[i] = Integer.parseInt(br.readLine()); if(arr[i]==0) {j++; } } int neg=0, poseve=0, posodd=0; for(int i=0;i { if(arr[i]<0) {neg++;} if(arr[i]>0 && arr[i]%2==0) {poseve++;} if(arr[i]>0 && arr[i]%2==1) {posodd++;} } System.out.println("\n\nNumber Of Negative Numbers: "+neg); System.out.println("Number Of Positive Even Numbers: "+poseve); System.out.println("Number of Positive Odd Numbers: "+posodd); } }

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