Examples

     printf("Hello world\n");
     printf("%d + %d equals %d\n", x, y, x+y );
     printf("%s\n", reply);

In general

     printf( Format , E1 , E2, E3 ... En )

• Format evaluates to a string
• The expressions E1...En evaluate to the values V1...Vn
• There are n format codes (%'s) in Format
• Each Vi is substituted for the corresponding code in Format

Width, Precision and Alignment

• To restrict the number of characters printed the codes can take a width and precision modifiers as in "%w.p<code>" where w and p are integers.

• Width and precision have different meanings for for different specifiers, for example %16.2f would print two characters to the right of the decimal place in an output field which is at least 16 characters long.

• Alignment of the data within the overall width can be left (default) or right.