Introduction

Hi everyone In this article we will create a javascript program to check number is positive or Negative. follow conditions are used

• N>0 then, Number is positive

• N<0 then, Number is Negative

• N=0 then, Number is zero

To solve this problem we will write code javascript code using three different methods

• Method 1: Using Brute Force

• Method 2: Using a Nested if-else statement

• Method 3: Using the Ternary operator

Flow Chart

Method: 1

Using the Brute Force method

Algorithm

• step1 Start

• step 2 Insert Number.

• step 3 If the number is greater than Zero then print “The number is Positive”

• step 4 If the number is smaller than zero, then print, “The number is Negative”

• step 5 Else print, “The number is Zero”

• step 6 stop

Javascript Code

let num = 5;

//Conditions to check if the number is negative or positive
if (num > 0) {
  console.log("The number is positive");
} else if (num < 0) {
  console.log("The number is negative");
} else {
  console.log("Zero");
}

Output:

The number is positive

Method: 2

Using nested if-else statement

Algorithm

• step 1 Start

• step 2 Insert the number.

• step 3 If the number is the greater or equal move to the inner nested loop4

• • step 3.1 If the number is zero, print Zero

    • step 3.2 Else print The Number is Positive

• step 4 Else the number has to be negative, Print The number is Negative

• step 5 stop

Javascript Code

let num1 = -5;

if(num1 => 0){
  if(num === 0){
    console.log("zero")
  }else{
    console.log("The number is positive");
  }
}else{
  console.log("The number is negative");
}

Output:

The number is negative

Method: 3

Algorithm

• step 1 Start

• step 2 Insert the number.

• step 3 If the number is equal to zero, the Print Number is Zero

• step 4 Else do the following – (num > 0)? “Positive”: “Negative”;

• step 5 stop

Javascript Code

Using Ternary operator

let num2 = 0;
if(num2 === 0){
  console.log("The number is zero")
}else{
   let result = num2>0 ? "The number is positive" : "The number is negative";
   console.log(result)
}

Output:

The Number is zero