Why is printf round floating point numbers up?

by

C99 §7.19.6.1 The fprintf function

f,F

A double argument representing a floating-point number is converted to decimal notation in the style [−]ddd.ddd, where the number of digits after the decimal-point character is equal to the precision specification. If the precision is missing, it is taken as 6; if the precision is zero and the # flag is not specified, no decimal-point character appears. If a decimal-point character appears, at least one digit appears before it. The value is rounded to the appropriate number of digits.

More Related Contents:

  1. Printf width specifier to maintain precision of floating-point value
  2. Correct format specifier for double in printf
  3. What happens to a float variable when %d is used in a printf?
  4. How does printf and co differentiate between float and double
  5. Is there a function to round a float in C or do I need to write my own?
  6. printf rounding behavior for doubles
  7. sin, cos, tan and rounding error
  8. What precisely does the %g printf specifier mean?
  9. C printf using %d and %f
  10. C dynamically printf double, no loss of precision and no trailing zeroes
  11. Dividing 1/n always returns 0.0 [duplicate]
  12. C/C++ printf() before scanf() issue
  13. Printing UTF-8 strings with printf – wide vs. multibyte string literals
  14. Why does printf() promote a float to a double?
  15. What operations and functions on +0.0 and -0.0 give different arithmetic results?
  16. How to printf a memory address in C
  17. Representing integers in doubles
  18. Why doesn’t scanf need an ampersand for strings and also works fine in printf (in C)?
  19. How do I print a non-null-terminated string using printf?
  20. What is the fastest way to convert float to int on x86
  21. Why does adding a small float to a large float just drop the small one?
  22. Strings and character with printf
  23. How to repeat a char using printf?
  24. Status of __STDC_IEC_559__ with modern C compilers
  25. Is fmod() exact when y is an integer?
  26. Scanf/Printf double variable C
  27. Printing chars and their ASCII-code in C
  28. Trouble with float on C [duplicate]
  29. pow() cast to integer, unexpected result
  30. What is the difference between %f and %lf in C?

Leave a Comment