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01-leap-year/Main.java

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+class Main{
+  public static void main(String[]args){
+    isleapyear(2022);//false
+    isleapyear(2024);//false
+    isleapyear(1900);//false
+    isleapyear(2000);//false
+  }//end of main method
+
+  public static void isLeapYear(int year){
+    if((year % 4 == 0) && ((year % 100 != )) || (year%400 == 0))){
+      System.out.println("This is a leap year");
+    }
+
+    else{
+      System.ot.println("This is not a leap year");
+    }
+  }
+}

02-fizzbuzz/Main.java

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+class Main {
+  public static void main(String[] args){
+    String game = "";
+    for(int a = 1;a <= 100;a++){
+      if(a % 3 == 0){
+        game = "fizz";
+        if(a % 5 == 0){
+          game += "buzz";
+        }
+      }else if(a % 5 == 0){
+        game = "buzz";
+
+      }else{
+        game = Integer.toString(a);
+      }
+      System.out.println(game);
+    }
+  }
+}
+
+

03-count-quarters/Main.java

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+class Main {
+  public static void main(String[] args) {
+    System.out.println(countQuarters(1278));
+    System.out.println(countQuarters(50));
+    System.out.println(countQuarters(5000));
+    System.out.println(countQuarters(125));
+    System.out.println(countQuarters(2279));
+    System.out.println(countQuarters(34));
+    System.out.println(countQuarters(0));
+  }//end of main method
+
+public static int countQuarters(int cents){
+
+  String cent = Integer.toString(cents);
+
+if(cent.length() < 2){
+  return 0;
+}
+
+  String remain = cent.substring(cent.length() - 2);
+
+  int remaining = Integer.valueOf(remain);
+
+  int numberOfQuarters = remaining/25;
+  return numberOfQuarters;
+
+

04-letter-grade/Main.java

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+class Main {
+  public static void main(String[] args) {
+    int grade = 99;
+    System.out.println(letterGrade(grade));
+
+    grade = 81;
+    System.out.println(letterGrade(grade));
+
+    grade =70;
+    System.out.println(letterGrade(grade));
+
+    grade = 69;
+    System.out.println(letterGrade(grade));
+
+    grade = 55;
+      System.out.println(letterGrade(grade));
+
+
+  }//end of main method
+
+  public static String letterGrade(int grade){
+
+    if (grade <= 100&& grade >= 90){
+      return "A";
+    } else if(grade < 90 && grade >= 80){
+      return "B";
+    } else if(grade < 80 && grade >= 70){
+      return "C";
+    } else if(grade < 70 && grade >= 60){
+      return "D";
+    } else {
+      return "F";
+    }
+  }
+}// end of grade method

05-div-by-3/Main.java

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+class Main {
+  public static void main(String[] args) {
+   divby3(1234);//True
+
+  }//end of main method
+
+  public static void divby3(int div){
+    int sum = 0;
+
+    while (div != 0) {
+      sum += div % 10;
+      div = div / 10;
+    }
+
+    if(sum % 3 == 0) {
+      System.out.println("This number divisible by 3");
+    }
+    else {
+      System.outprintln("This number is not divisible by 3");
+    }
+  }
+}

06-shapes/Main.java

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+class Main {
+  public static void main(final String[] args) {
+    sentence(6, 4);
+  }
+
+  public static void sentence(final int l, final int w) {
+    for (int row = 0; row < w; row++) {
+      for (int col = 0; col < l; col++) {
+        System.out.print("*");
+      }
+      System.out.println();
+    }
+  }
+
+
+class Main{
+  public static void main(String [] args){
+    rightTriangle(4);
+  }
+  public static void rightTriangle(int s){
+    int p = 0;
+    for(int row = 0; )
+    for(int col=0; col <=p; col++){
+
+    }
+  }
+}