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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));
}
}
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