Introduction to C-Programming: As seen in ENGS 20

Section 3.7 Summary

• printf() is used to display a message to the screen. Example:

  printf("This will be displayed on the screen!");
  

• \n starts a new line. Example:

  printf("Hello!\nMy name is Petra!");
  

• Quotation marks need to be "escaped", as in: \", \'. Example:

  printf("She said: \"Today it\'s Monday!\" ");
  

• Loops are used to repeat instructions multiple times. Example:

  int i;
  for (i=0; i<3; i++) {  
      printf("Hello! ");
      printf("Hi!\n");
  }
  

• Comments are important throughout your code. Comments can be included in your code by enclosing them in /* ... */ or by using //. Example:

  int main(void) {
      int i; /* This is a comment. */
      /* This is also a comment. */
      /* A comment
         can go over
         multiple lines.
      */
      for (i=0; i<3; i++) {  
          printf("Hello! "); // This comment ignores the remainder of the line.
          printf("Hi!\n");
      }
  }