ASCII codes for line feeds
In decimal, the ASCII codes for carriage returns and line feeds are
– Carriage returns: 13
– Line feeds: 10
Before computers even existed, there was this contraption called a teletype Model 33, which was capable of typing 10 characters per second. But it had a problem in that it took 0.2 seconds to type a line break, which was exactly two characters. If a new character came through in that 0.2 seconds, that character would be lost.
So the developers came up with a way to solve this problem by adding two end-of-line characters to each line. One is called a “carriage return,” which tells the typewriter to position the print head on the left border, and the other is called a “line feed,” which tells the typewriter to move the paper down one line.
Unix system, the end of each line only “< line feed & gt;”, that is, “\n”; Windows system, the end of each line is “< line feed & gt; & lt;Enter>”, i.e. “\n\r”; and on the Mac, each line ends with “<Enter>”. A direct consequence of this is that when a Unix/Mac file is opened in Windows, all the text becomes one line; and when a Windows file is opened in Unix/Mac, there may be an extra ^M symbol at the end of each line
What is the ASCII code for the enter key
The ASCII code can be found in the ASCII code table.
The Enter key, ASCII code is 13, control character CR, escape character \r.
The Line Feed key, ASCII code is 10, control character LF, escape character \n.
The Space Bar, ASCII code is 32.
What are the ASCII codes for enter, line feed, and space bar and their functions?
The ASCII codes for enter, line feed, and space are 13, 10, and 32, respectively. When these three ASCII codes are displayed on the screen, enter causes the cursor to go back to the beginning of the line (equivalent to pressing the HOME key inside Notepad), line feed causes the cursor to move to the next line (equivalent to pressing the down arrow inside Notepad), and space causes the cursor to move right one position.
What is the ascii code for ‘\n’?
‘\r’ ASCII code for 13 is a carriage return, moving the current position to the head of this line.
printf(“xx\ryy\n”); xx will not be output.
‘\n’ ASCII code of 10 is a line feed, moving the current position to the next line.
printf(“xx\nyy\n”); two lines will be output:
‘\r’ is the character with an ASCII code of 13
C:\0 and \n what they represent
\0 is generally used as the end of a string and has an ASCode value of 0.
\n is the representation of a newline (new line), which has an ASCode value of 0x0A
The representation of a carriage return is: \r, which has an ASCode value of 0x0D
The carriage return and the Line feed are different characters, and the representation you see for a new line is different in various operating systems. Inside Windows you need a combination of both, i.e., \r\n; inside Unix you just need \n.
The carriage return line break you’re talking about is usually just \r\n.
What is the relationship between \n, the null character, \0, and the three?
\0 and \n are both escape characters in C language.
\0 means the null character NULL, the corresponding ASCII code is 0, which is usually used to indicate the end flag of a string;
\n means a carriage return line feed, the corresponding ASCII code is 10, which is usually used in the printf function to output a line feed;
Examples are as follows:
chara=”abcd”;// Initialize a string
// The following while loop is counting the number of characters in the character array a
while(a[i]! =’\0′)//exit the while loop when the end-of-character marker ‘\0’ is encountered
i++;//the number of characters plus 1
printf(“The number of characters in array a is: %d\n”,i);//using the carriage return line feed ‘\n’ is to break a line after outputting the result (same as the word in the same line feed)
// After the implementation of the output is as follows:
The number of characters in the array a: 4