Basic Programmings In Java.

1.Factorial of Given Number Using Java.

import java.util.*; 

class factorial{

public static int fact(int n){

if(n<3){

return 1;

}

else{

return fact(n-1)+fact(n-2);

}

}

public static void main(String[] args){

        Scanner in=new Scanner(System.in);

        int n=in.nextInt();

System.out.println(fact(n));

}

}

output:

6

8

2.staireCase Using Java Programming.

class staireCase{

public static void main(String[] args){

int n=5;

for(int i=1;i<=n;i++){

for(int j=0;j<n;j++){

if(j>=n-i)

{

System.out.print("#");

}

else

{

System.out.print(" ");

}

}

System.out.println();

}

}

}

output:

#

##

###

####

#####

3.Linear Search

//o(n) Time Complexity Worst Case

//o(n) Average Case

//o(1) Best Case

class LinearSearch{

public int find(int[] arr,int data){

int n=arr.length;

for(int i=0;i<n;i++){

if(arr[i]==data){

return i;

}

}

return -1;

}

public static void main(String[] args){

int[] arr={7,10,2,5,1,3,32,44,100,52,62};

LinearSearch l=new LinearSearch();

int find=5;

System.out.println(l.find(arr,find));

}

}