Learn to Program with C_ Learn to Program using the Popular C Programming Language ( PDFDrive )

Chapter 1 ■ Elementary Programming Concepts
Exercise: Write a program to print the lyrics of
your favorite song
1.7.2 Escape Sequences
Within the string argument to printf, the backslash (\) signals that a special effect is needed at this
point. The character following the backslash specifies what to do. This combination (\ followed by
another character) is referred to as an escape sequence. The following are some escape sequences you
can use in a string in a printf statement:
\n issue a newline character
\f issue a new page (form feed) character
\t issue a tab character
\" print "
\\ print \
For example, using an escape sequence is the only way to print a double quote as part of your output.
Suppose we want to print the line
Use " to begin and end a string
If we typed
printf("Use " to begin and end a string\n");
then C would assume that the double quote after Use ends the string (causing a subsequent error
when it can’t figure out what to do with to). Using the escape sequence \", we can correctly print
the line with:
printf("Use \" to begin and end a string\n");
Exercise: Write a statement to print the line:
An escape sequence starts with \
1.7.3 Print the Value of a Variable
So far, we have used printf to print the value of a string constant (that is, the characters of the string
excluding the quotes). We now show how we can print the value of a variable ignoring, for the moment,
how the variable gets its value. (We will see how in Chapter 2.) Suppose the integer variable m has the
value 52. The statement:
printf("The number of students = %d\n", m);
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