Missing number:
package afterfeb13;
public class missingnum {
public static void main(String[] args) {
int[] arr = { 10, 20, 30, 40, 50, 70, 80, 90, 110 };
for (int i = 1; i < arr.length; i++) {
if (arr[i] == arr[i - 1] + 10) {
continue;
} else {
System.out.println(arr[i] - 10);
break;
}
}
}
}
Output:60
Reverse Number: using new array
package afterfeb13;
public class reversenumber {
public static void main(String[] args) {
int[] a = { 10, 20, 30, 40, 50 };
int[] b = new int[a.length];
int j = a.length - 1;
for (int i = 0; i < a.length; i++) {
b[i] = a[j];
j--;
}
for (int i = 0; i < a.length; i++) {
System.out.print(b[i] + " ");
}
}
}
Output:
50 40 30 20 10
Reverse Number
package afterfeb13;
public class reversenumber1 {
public static void main(String[] args) {
int[] a = { 10, 20, 30, 40, 50 };
int len = a.length - 1;
int i = 0;
while (i < len) {
int tem = a[i];
a[i] = a[len];
a[len] = tem;
i++;
len--;
}
for (i = 0; i < a.length; i++) {
System.out.print(a[i] + " ");
}
}
}
Output:
50 40 30 20 10
Find subarray with a given sum
package afterfeb13;
public class subarry {
public static void main(String[] args) {
int[] a = { 10, 20, 30, 40, 50, 60, 70, 80, 90, 100 };
int num = 110;
for (int j = 0; j < a.length; j++) {
for (int i = j + 1; i < a.length; i++) {
if (a[j] + a[i] == num) {
System.out.println(a[j] + " + " + a[i] + " =" + num);
}
}
}
}
}
Output:
10 + 100 =110
20 + 90 =110
30 + 80 =110
40 + 70 =110
50 + 60 =110
Roating Rigth to left
package afterfeb13;
public class roatingrl {
public static void main(String[] args) {
int[] arr = { 10, 20, 30, 40, 50 };
int temp = arr[arr.length - 1];
for (int i = arr.length - 1; i > 0; i--) {
arr[i] = arr[i - 1];// rigth to left arr[4]=arr[3],arr[3]=arr[2]
}
arr[0] = temp;
for (int i = 0; i < arr.length; i++) {
System.out.print(arr[i] + " ");
}
}
}
Output:50 10 20 30 40
Roating left to right
package afterfeb13;
public class roatinglr {
public static void main(String[] args) {
int[] arr = { 10, 20, 30, 40, 50 };
int temp=arr[0];//0
for(int i =0; i < arr.length-1; i++)
{
arr[i]=arr[i+1];// left to rigth arr[0]=arr[1],arr[1]=arr[2]
}
arr[arr.length-1]=temp;//10
for(int i=0;i<arr.length;i++)
{
System.out.print(arr[i]+" ");
}
}
}
output:20 30 40 50 10
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