C Language Zemi

String literal

This is a description of a string literal that expresses string in the source code. String literals are represented by enclosing them in double quotation "" ".

// String literal
"Hello"

This is a sample that outputs a string literal. String literals can be assigned to variables in char *. I think that string literals are mostly treated as constants, so it is recommended to assign them to variables declared with "const char *". You can print a string in the "%s" format of the printf function.

#include <stdio.h>

int main (void) {
  const char * message = "Hello";
  
  printf("%s\n", message);
}

This is the output result.

Hello

Escape sequence of string literals

Escape sequence of string literals. You can express tabs and line breaks with "\ t" and "\ n".

This is a sample escape sequence for string literals.

#include <stdio.h>

int main (void) {

  const char * message = "He \ tllo\n";
  
  // Escape sequence of string literals
  printf("%s", message);
}

This is the output result.

He llo

Arbitrary string of ASCII code

You can use the escape sequence "\ x hexadecimal ASCII code" to represent any string of ASCII code. The following represents the ASCII code "a" in hexadecimal.

\ x61

This is a sample that uses an arbitrary string of ASCII code in the escape sequence of a string literal.

#include <stdio.h>

int main (void) {

  const char * message = "He \ x61 llo";
  
  // Escape sequence of string literals
  printf("%s\n", message);
}

This is the output result. "\ X61" outputs a.

He a llo

Escape sequence list