# Problem Set 1 - Hello 👋

We are now introduced to the world of **C**. C is a programming language that has all the features of Scratch, but is a lot less friendly and is purely text. This might seem intimidating at first, but with practice comes improvement!

In `Hello`, we are tasked to get the name of the user and print it with "Hello, ". To start from the beginning, we would first need to include two libraries in C which are the **Standard I/O** and **CS50** libraries. We would add these to the top of our code like this:

```c
#include <stdio.h>
#include <cs50.h>
```

The **Standard I/O** library includes all the basic functionalities like `printf()` which prints formatted strings to the console. Similarly, the **CS50** library includes additional functionalities like `get_string()` which takes in a string input from the user.

And now, we would type in `int main(void)` with two curly braces, and inside those braces, we would type in our code.

```c
int main(void)
{
    string name = get_string("What's your name? ");
    printf("hello, %s\n", name);
}
```

C is a **statically typed language**, which means it is designed to optimize hardware efficiency and that the data types must be declared and considered at all times. With that in mind, we declare a string **variable** and give it a name that we can call later on and it would look like `string name`. We would then initialize it by adding an `=` sign and then storing whatever we'd like in that variable. In our case, we would type in `get_string("What's your name? ");` so we could store the user's name and call it later. Don't ever forget to put a **semicolon** to end the line! And now, to greet the user hello, we would add `printf("hello, %s\n", name);`. The `\n` would indicate that we would like a **new line**. We will use a **format code** which is the `%s`, then outside the quotation marks, a comma, and the variable we would like to call! We then compile and run it.

```bash
hello/ $ make hello
hello/ $ ./hello
hello/ $ What's your name? Hoakin
hello/ $ hello, hoakin
hello/ $
```

Thank you for reading and that is `hello` for you!