exercise1.Rmd

## Exercice 1. Getting started.

Create the script "exercise1.R" (in R Studio: File -> New File) and save it to the "Rcourse/Module1" directory: you will save all the commands of exercise 1 in that  script.
<br>Remember you can comment the code using #.

**1- From the terminal, go to Rcourse/Module1.
First check where you currently are with getwd(); 
then go to Rcourse/Module1 with setwd()**

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<summary>
correction
</summary>

```{r, eval=FALSE}
getwd()
setwd("Rcourse/Module1")
setwd("~/Rcourse/Module1")
```

</details>


**2- Using R as a calculator, calculate the square root of 654.**

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<summary>
correction
</summary>

```{r}
sqrt(654)
```

</details>

**3- Using R as a calculator, calculate the percentage of males and females currently present in the classroom.**

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</summary>

```{r}
# 6 males out of 19 students:
(6/19) * 100
# 13 females out of 19 students
(13/19) * 100
```

</details>

**4- Create a new object "myobject" with value 60.
Show "myobject" in the terminal.**

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```{r}
myobject <- 60
myobject
```

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**5- Reassign myobject with value 87.**

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</summary>

```{r}
myobject <- 87
```

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**6- Subtract 1 to myobject. Reassign.**

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</summary>

```{r}
myobject <- myobject - 1
```

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**7- Create a new object "mysqrt" that will store the square root of "myobject".**

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<summary>
correction
</summary>

```{r}
mysqrt <- sqrt(myobject)
```

</details>

**8- Create a new object "mydiv" that will store the result of "myobject" divided by "mysqrt".**

<details>
<summary>
correction
</summary>

```{r}
mydiv <- myobject / mysqrt
```

</details>