DEV Community: Aafthab Ali Shaik

more efficient Calculator in Java

Aafthab Ali Shaik — Sat, 22 Mar 2025 14:50:57 +0000

the code!!

import java.util.Scanner;
public class Main
{
    public static int sum(int num1,int num2){
        return num1+num2;
    }
    public static int sub(int num1,int num2){
        return num1-num2;
    }
    public static int mul(int num1,int num2){
        return num1*num2;
    }
    public static int div(int num1,int num2){
        return num1/num2;
    }
    public static void main(String[] args){
        Scanner sc = new Scanner(System.in);
        System.out.println("\nEnter the First number:");
        int a = sc.nextInt();
        System.out.println("\nEnter the Second number:");
        int b = sc.nextInt();
        System.out.println("\n Enter 1 of Addition\n Enter 2 of Subtraction \n Enter 3 for Multiplication \n Enter 4 for Divison:");
        int c = sc.nextInt();
        int sumresult = sum(a,b);
        int subresult = sub(a,b);
        int mulresult = mul(a,b);
        int divresult = div(a,b);
        if (c==1){
            System.out.println("The Addition of " +a+ " and " +b+ " is " +sumresult);
        }
        else if(c==2){
            System.out.println("The Subtraction of "+a+ " and "+b+" is "+subresult);
        }
        else if(c==3){
            System.out.println("The Multiplication of "+a+" and "+b+ " is "+mulresult);
        }
        else if(c==4){
            System.out.println("The Divison of "+a+" and "+b+" is "+divresult);
        }
        else
        while(c<4||c<=0){
            System.out.println("Please Enter the Number between 1 and 4:");
             c = sc.nextInt();
        }
    }
}

It's Been a While!!

Aafthab Ali Shaik — Fri, 21 Mar 2025 12:19:28 +0000

Let's Not disturb the flow!!

Aafthab Ali Shaik — Tue, 18 Mar 2025 16:43:14 +0000

Factorial till N Without recursion!!

Aafthab Ali Shaik — Tue, 18 Mar 2025 16:40:29 +0000

#include <stdio.h>

int main()
{
    int n,count;
    scanf("%d",&n);
    count =1;
    for(int i =1;i<=n;i++){
        count *=i;
    }
    printf("%d",count);

    return 0;
}

as we know recursion is used to call a function to itself
and here this is a code without using recursion!! it is able to find the factorial till n!! to understand more about recursion check my previous factorial code using recursion or do message!! :)

“The only thing that never changes is that everything changes.”

Aafthab Ali Shaik — Sun, 16 Mar 2025 15:26:11 +0000

Factorial till n Numbers!!

Aafthab Ali Shaik — Sun, 16 Mar 2025 10:14:09 +0000

Written code!!

import java.util.Scanner;
public class Main
{
    public static int fact(int num){
        if(num!=1){
            return num*fact(num-1);
        }
        return 1;
    }
    public static void main(String[] args){
        Scanner sc = new Scanner(System.in);
        System.out.println("Enter The Number:"); 
        int i = sc.nextInt();
        int result = fact(i);
        System.out.println("The Factorial of " +i+" is " +result);
    }
}

what's Next?

Aafthab Ali Shaik — Sun, 16 Mar 2025 05:01:00 +0000

To Find Whether the Given Number is Prime or Not!!

Aafthab Ali Shaik — Sun, 16 Mar 2025 04:59:43 +0000

Written Code!!

import java.util.Scanner;
public class Main{
    public static void main(String[] args){
        Scanner sc = new Scanner(System.in);
        int s = sc.nextInt();
        int count = 0;
        for(int i = 1;i<=s;i++){
            if(s%i==0){
                count+=1;

            }
        }
        if(count==2){
            System.out.println("Its a Prime Number:");
        }else{
            System.out.println("Its Not a Prime Number:");
        }


    }
}

Prime Numbers Till N!

Aafthab Ali Shaik — Sat, 15 Mar 2025 17:10:41 +0000

Written Code!!

import java.util.Scanner;
public class Main{
    public static int is_prime(int num){
        if(num<=0){
            return 0;
        }
        if(num==1){
            return 0;
        }
        for(int i = 2;i<=num/2;i++){
            if(num%2==0){
                return 0;
            }
        }

        System.out.println(num);
        return 1;
    }
    public static void main(String[] args){
        Scanner sc = new Scanner(System.in);
        System.out.println("Enter the Number:");
        int n = sc.nextInt();
        System.out.println();
        for(int i = 1;i<=n;i++){
            is_prime(i);
        }
    }
}

Something is better than Nothing! he he he!

Aafthab Ali Shaik — Tue, 11 Mar 2025 15:58:45 +0000

Sample Calculator! :)

Aafthab Ali Shaik — Tue, 11 Mar 2025 15:52:29 +0000

import java.util.Scanner;
public class Main
{
public static int sum(int num1,int num2){
   return num1+num2;
}
public static int sub(int num1,int num2){
   return num1-num2;
}
public static int mul(int num1,int num2){
   return num1*num2;
}
public static double divi(int num1,int num2){
   return num1/num2;
}
public static double per(int num1,int num2){
   return num1%num2;
}

public static void main(String[] args){
   Scanner sc = new Scanner(System.in);
   System.out.println("Enter number:");
   int num1= sc.nextInt();
   System.out.println("Enter the second number:");
   int num2= sc.nextInt();
   System.out.println("\n1.Addition\n2.Subtraction\n3.Multiplication\n4.Divison:");
   int n = sc.nextInt();
   int sum1=sum(num1,num2);
   int sub1=sub(num1,num2);
   int mul1=mul(num1,num2);
   double divi1=divi(num1,num2);
   double per1=per(num1,num2);
   if(n==1){
       System.out.println(" \nAddition of "+num1+" and "+num2+" is "+sum1);
   }
   else if(n==2){
       System.out.println(" \nSubtraction of "+num1+" and "+num2+" is "+sub1);
   }
   else if(n==3){
       System.out.println(" \nMuliplication of "+num1+" and "+num2+" is "+mul1);
   }
   else if(n==4){
       System.out.println("\nDivison of "+num1+" and "+num2+" is  "+divi1);
   }else if(n==5){
       System.out.println("\nto find remainder of "+num1+" and "+num2+" is "+per1);
   }else{
       System.out.println("\n1 Please Enter a valid number between from 1 to 5!");
   }
}

}

Check this out!!

Factorial Calculator!

Aafthab Ali Shaik — Sun, 09 Mar 2025 16:16:06 +0000

import java.util.Scanner;
public class Main{
    public static void main(String[] args){
        Scanner sc = new Scanner(System.in);
        int a = sc.nextInt();
        int count = 1;
        for(int i = 1;i<=a;i++){
            count *=i;
            System.out.println(i+" = "+count);
        }
    }
}

so here it forms a for loop and i starts from 1 to input value a has firstly count = 1, and count value is 1 and for 1st loop run value of count = 1*1 = 1 As in the statement count*=i it says(count = count *i) as so for 2nd loop run i value is 2 so count=1*2=2 and so on........ i hope you get it if else feel free to ask me i will assist you!! :)