End a new line text in c

In C, you can end a line of text using the \n character, which is an escape sequence that represents a newline.

Here are a few ways to do it:

Using the \n character:
```
printf("Hello, world!\n");
```
This will print "Hello, world!" followed by a newline character.
Using the puts function:
```
puts("Hello, world!");
```
The puts function automatically appends a newline character to the end of the string.
Using the fprintf function:
```
fprintf(stdout, "Hello, world!\n");
```
This will print "Hello, world!" followed by a newline character to the standard output stream.

Note that in all cases, the \n character is a single character, not a string.