# Plus Minus in Algorithm | HackerRank Programming Solutions | HackerRank Problem Solving Solutions in Java [💯Correct]

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#### Introduction To Algorithm

The word Algorithm means “a process or set of rules to be followed in calculations or other problem-solving operations”. Therefore Algorithm refers to a set of rules/instructions that step-by-step define how a work is to be executed upon in order to get the expected results.

### Advantages of Algorithms:

• It is easy to understand.
• Algorithm is a step-wise representation of a solution to a given problem.
• In Algorithm the problem is broken down into smaller pieces or steps hence, it is easier for the programmer to convert it into an actual program.

Link for the ProblemPlus Minus – Hacker Rank Solution

`Plus Minus– Hacker Rank Solution`

### Problem:

Given an array of integers, calculate the ratios of its elements that are positivenegative, and zero. Print the decimal value of each fraction on a new line with  places after the decimal.

Note: This challenge introduces precision problems. The test cases are scaled to six decimal places, though answers with absolute error of up to  are acceptable.

Example

```0.400000
0.400000
0.200000
```

Function Description

Complete the plusMinus function in the editor below.

plusMinus has the following parameter(s):

• int arr[n]: an array of integers

Print
Print the ratios of positive, negative and zero values in the array. Each value should be printed on a separate line with  digits after the decimal. The function should not return a value.

Input Format

The first line contains an integer, , the size of the array.
The second line contains  space-separated integers that describe .

Constraints

Output Format

Print the following  lines, each to  decimals:

1. proportion of positive values
2. proportion of negative values
3. proportion of zeros

Sample Input

```STDIN           Function
-----           --------
6               arr[] size n = 6
-4 3 -9 0 4 1   arr = [-4, 3, -9, 0, 4, 1]
```

Sample Output

```0.500000
0.333333
0.166667
```

Explanation

`Plus Minus – Hacker Rank Solution`
```import java.util.Scanner;

/**
*
* @author Techno-RJ
*
*/
public class PlusMinus {
public static void main(String[] args) {
Scanner in = new Scanner(System.in);
int n = in.nextInt();
int arr[] = new int[n];
float countPositive = 0;
float countNegetive = 0;
float countZero = 0;
for (int arr_i = 0; arr_i < n; arr_i++) {
arr[arr_i] = in.nextInt();
if (arr[arr_i] < 0) {
countNegetive++;
}
if (arr[arr_i] > 0) {
countPositive++;
}
if (arr[arr_i] == 0) {
countZero++;
}
}
System.out.printf("%1.6f \n", countPositive / n);
System.out.printf("%1.6f \n", countNegetive / n);
System.out.printf("%1.6f \n", countZero / n);
in.close();
}
}``` #### Ads Blocker Detected!!!

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