Question

answer for how it would be evaluated in Java without writing a code for it.

a) 17 + 2 - 5 / 5

b) 2 + 3 * 5 - 2

c) 3 * 2 / 3 + 8

d) 6 % 2 * 10

Problem 2

: Write an application in java that inputs one number consisting of 5 digits (e.g.

12345) from the user, separates the number into its individual digits and prints the digits

separated from one another by three spaces each (e.g. 1    2    3    4    5).

Assume that the user enters the correct number of digits. What happens when

you enter a number with more than five digits? What happens when you enter a number

with fewer than five digits?

Problem 3:

Write an application in java that reads an integer and determines and prints

whether it’s odd or even.

Problem 4

: Write an application that calculates the squares and cubes of the numbers

from 0 to 10 and prints it in tabular format

Problem 5

: Write a in java program that inputs five integers and determines and prints the

number of negative integers entered, number of positive integers entered and the

number of zeros entered.

Answer 1

problem 1 .

In java every operator has its priority that is called operator precedence .

so in java operator precedence is :-

1 .) * / %    (multiplication , division and modulus operator have same priority so the which will encounter first from left in an expression will be evaluated first ).

2.) + - (Addition and multiplication have same priority so the which will encounter first from left in an expression will be evaluated first ).

there are many more operator in java and every operator have its priority .

below is the attached table with operators with its priority

Level	Operator	Description	Associativity
16	[] . ()	access array element access object member parentheses	left to right
15	++ --	unary post-increment unary post-decrement	not associative
14	++ -- + - ! ~	unary pre-increment unary pre-decrement unary plus unary minus unary logical NOT unary bitwise NOT	right to left
13	() new	cast object creation	right to left
12	* / %	multiplicative	left to right
11	+ - +	additive string concatenation	left to right
10	<< >> >>>	shift	left to right
9	< <= > >= instanceof	relational	not associative
8	== !=	equality	left to right
7	&	bitwise AND	left to right
6	^	bitwise XOR	left to right
5	|	bitwise OR	left to right
4	&&	logical AND	left to right
3	||	logical OR	left to right
2	?:	ternary	right to left
1	=   +=   -= *=   /=   %= &=   ^=   |= <<= >>= >>>=	assignment	right to left

Coming to equations

a) 17 + 2 - 5 / 5

first division operator will be evaluated then addition and them subtraction

so after evaluation answer will come i.e. = 18

b) 2 + 3 * 5 - 2

first multiplication then addition and then subtraction will be evaluated

so after evaluation answer will come i.e. = 15

c) 3 * 2 / 3 + 8

first multiplication operator will be evaluated then division and then addition

so after evaluation answer will be = 10

d) 6 % 2 * 10

first modulus then multiplication operator will be evaluated

so after evaluation answer will be = 0

PROBLEM 2.

program: -

import java.util.Scanner;
public class splitdigit {
   public static void main(String[] args) {
       Scanner sc=new Scanner(System.in);
       int num=sc.nextInt();
       String s="";
       while (num > 0) {
            s="   "+(num%10)+s;
            num = num / 10;
       }
       System.out.println(s.trim());
   }
}

output : -

PROBLEM 3.

Program : -

import java.util.Scanner;
public class evenorodd {
   public static void main(String[] args) {
       Scanner sc=new Scanner(System.in);
       int num=sc.nextInt();
       if(num%2==0) {
           System.out.println("even");
       }else {
           System.out.println("odd");
       }
   }
}

output :-

PROBLEM 4.

program : -

public class SQUAREANDCUBE {
   public static void main(String[] args) {
       System.out.println("SQUARE\tCUBE");
       for(int i=0;i<=10;i++) {
           System.out.println(i*i+"\t"+i*i*i);
       }
   }
}

output : -

PROBLEM 5.

Program : -

import java.util.Scanner;
public class SQUAREANDCUBE {
   public static void main(String[] args) {
       Scanner sc=new Scanner(System.in);
       int n=0,p=0,z=0;
       int num;
       for(int i=0;i<5;i++) {
           num=sc.nextInt();
           if(num<0)n++;
           if(num>0)p++;
           if(num==0)z++;
       }
       System.out.println("Negative = "+n+"\nPositive = "+p+"\nZero = "+z);
      
   }
}

output : -