How can I limit the number of digits displayed by printf after the decimal point?

Question

I wrote a small program that reads two integers using scanf , and then performs various arithmetic calculations. I use printf to display the results. How can I make printf display only two digits after the decimal point? Starting with a simplified code example:

 #include <stdio.h> int main(void) { double third = 1.0 / 3.0; // display data printf("\n%20s%20s", "Description", "Data"); printf("\n%20s%20s", "-----------", "----"); printf("\n%20s%20lf", "One third", third); printf("\n"); return 0; } 

Prints "0.333333" for the value of third . How can I change above to get the following result?

          Description Data
          ----------- ----
            One third 0.33

Answer 1

use "% .2f" in the right place.

For example, change the following statement

 printf("\n%20s%20lf", "Fraction", quotientdecimal); 

in that:

 printf("\n%20s%.2f", "Fraction", quotientdecimal); 

will display only two digits of a fraction of the quotlentdecimal variable.