 # R Program to check given number is Positive, Negative or Zero

## How to check given number is Positive, Negative, or Zero

Here we are explaining how to write an R program to check given number is Positive, Negative, or Zero. We can use the `readline()` function to take input from the user (terminal). Here the prompt argument can choose to display an appropriate message for the user.

## How checking of positive, negative, or zero is implemented in R Program

We are using `readline()` function for taking the user's input. Given below are the steps which are used in the R program to check given number is Positive, Negative or Zero. In this R program, we accept the user's input into the variable number by providing an appropriate message to the user using '`prompt`'. If the number is greater than zero it is positive. If the number is less than zero it is negative.

## ALGORITHM

STEP 1: prompting appropriate messages to the user

STEP 2: take user input using `readline()` into variables number

STEP 3: check if the number is negative, zero, or positive using `if...else` statement

STEP 4:`If` the number is greater than zero it is positive

STEP 5:`elseIf` the number is less than zero it is negative

STEP 6:else the number is zero

## R Source Code

```                                          ```number = as.double(readline(prompt="Enter a number: "))
if(number > 0) {
print("It is a Positive number")
} else {
if(number == 0) {
print("number is Zero")
} else {
print("It is a Negative number")
}
}```
```

## OUTPUT

```Enter a number: -5.5
 "It is a Negative number"

Enter a number: 5
 "It is a Positive number"

Enter a number: 0
 "number is Zero"```
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