R tutorial and example for Beginners - R Program to check given number is Positive, Negative or Zero

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(56)

if(number > 0) {
  
  print("It is a Positive number")
  
} else {
        if(number == 0) {
  
              print("number is Zero")
          } 
      
        else {
      
              print("It is a Negative number")
        }
}

## [1] "It is a Positive number"

R Source Code

number = as.double(-47)

if(number > 0) {
  
  print("It is a Positive number")
  
} else {
        if(number == 0) {
  
              print("number is Zero")
          } 
      
        else {
      
              print("It is a Negative number")
        }
}

## [1] "It is a Negative number"

R Source Code

number = as.double(0.0)

if(number > 0) {
  
  print("It is a Positive number")
  
} else {
        if(number == 0) {
  
              print("number is Zero")
          } 
      
        else {
      
              print("It is a Negative number")
        }
}

## [1] "number is Zero"