How to add 2 numbers in R?
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# How to add 2 numbers in R?

This recipe helps you add 2 numbers in R

## Recipe Objective

How to add two numbers in R? The addition of two numbers is an arithmetic operation of adding the two numbers and storing the output in a vector. The input values can be pre-defined or can be user-defined. The addition operation can be done on a single number or a list of input values. sum () is the function used for performing the operation. This recipe performs the addition of two numbers using the + as well as the sum () function..

## Step 1- Create 2 input vectors

``` x <- 10 y <- 20 ```

## Step 2- Add the vectors

Add the two input vectors and store the output value in a third vector

``` z <- x+y print(paste("Addition of two numbers is:",z)) ```
`"Output of the code is : Addition of two numbers is"  : 30 `

## Step 3- User defined input vectors

Addition of two numbers can also be done , with user defined values using the following syntax

``` a <- readline(prompt="enter the first input value : ") b <- readline(prompt="enter the second input value : ") ```
```"Output of the line is":
enter the first input value : 10
enter the second input value : 20
```

The user defined input values are character type , they are converted into integer type for performing the addition operation

``` a <- as.integer(a) b <- as.integer(b) ```

## Step 4 - Add two user defined vectors

Adding two user defined input vectors and storing the output in a third vector

``` c <- a + b print(paste("Addition of user defined two numbers is:",c)) ```
`"Output of the code is : Addition of two numbers is" : 30 `

## Step 5- Using built in function sum()

``` x <- c(10,20) print(paste("Addition of two numbers is :",sum(x))) ```
`"Output of the code is : Addition of two numbers is" : 30`

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