Course Content

R Introduction: Part I

## R Introduction: Part I

# Using the print() Function

After running the code in the previous chapter, you may have noticed `[1]`

preceding the results. This is R's way of indicating that the line starts with the **first element** in your output. As you progress through the course, you'll encounter outputs with **multiple elements**.

Let's say we want to carry out a division operation:

As we already know, in R, it's **unnecessary** to use a specific function to display output values. However, if your goal is to **round** a number to a desired number of significant figures, you can use the `print()`

function, which you may also recognize from other programming languages.

Here's how you use the function:

For instance, we can round the division result from our previous example to **three significant figures**:

As demonstrated, the output of the expression has been rounded to **three significant figures**.

Task

- On the first line, execute a division of
`50`

by`7`

. - On the second line, divide
`50`

by`7`

again, but this time round the result to**four significant figures**using the`print()`

function.

Task

- On the first line, execute a division of
`50`

by`7`

. - On the second line, divide
`50`

by`7`

again, but this time round the result to**four significant figures**using the`print()`

function.

Everything was clear?

# Using the print() Function

After running the code in the previous chapter, you may have noticed `[1]`

preceding the results. This is R's way of indicating that the line starts with the **first element** in your output. As you progress through the course, you'll encounter outputs with **multiple elements**.

Let's say we want to carry out a division operation:

As we already know, in R, it's **unnecessary** to use a specific function to display output values. However, if your goal is to **round** a number to a desired number of significant figures, you can use the `print()`

function, which you may also recognize from other programming languages.

Here's how you use the function:

For instance, we can round the division result from our previous example to **three significant figures**:

As demonstrated, the output of the expression has been rounded to **three significant figures**.

Task

- On the first line, execute a division of
`50`

by`7`

. - On the second line, divide
`50`

by`7`

again, but this time round the result to**four significant figures**using the`print()`

function.

Task

- On the first line, execute a division of
`50`

by`7`

. - On the second line, divide
`50`

by`7`

again, but this time round the result to**four significant figures**using the`print()`

function.

Everything was clear?

# Using the print() Function

After running the code in the previous chapter, you may have noticed `[1]`

preceding the results. This is R's way of indicating that the line starts with the **first element** in your output. As you progress through the course, you'll encounter outputs with **multiple elements**.

Let's say we want to carry out a division operation:

As we already know, in R, it's **unnecessary** to use a specific function to display output values. However, if your goal is to **round** a number to a desired number of significant figures, you can use the `print()`

function, which you may also recognize from other programming languages.

Here's how you use the function:

For instance, we can round the division result from our previous example to **three significant figures**:

As demonstrated, the output of the expression has been rounded to **three significant figures**.

Task

- On the first line, execute a division of
`50`

by`7`

. - On the second line, divide
`50`

by`7`

again, but this time round the result to**four significant figures**using the`print()`

function.

Task

- On the first line, execute a division of
`50`

by`7`

. - On the second line, divide
`50`

by`7`

again, but this time round the result to**four significant figures**using the`print()`

function.

Everything was clear?

`[1]`

preceding the results. This is R's way of indicating that the line starts with the **first element** in your output. As you progress through the course, you'll encounter outputs with **multiple elements**.

Let's say we want to carry out a division operation:

**unnecessary** to use a specific function to display output values. However, if your goal is to **round** a number to a desired number of significant figures, you can use the `print()`

function, which you may also recognize from other programming languages.

Here's how you use the function:

**three significant figures**:

As demonstrated, the output of the expression has been rounded to **three significant figures**.

Task

- On the first line, execute a division of
`50`

by`7`

. - On the second line, divide
`50`

by`7`

again, but this time round the result to**four significant figures**using the`print()`

function.