C Tutorial/printf scanf/printf Precision
For floating arguments, precision indicates how many digits are printed after decimal points.
#include <stdio.h>
main()
{
printf("%10.4e\n", 35.99999);
}3.6000e+01
Precision
Precision indicates the minimum number of digits printed for type integers d, i, o, u, x, and X.
#include <stdio.h>
main()
{
printf("%10.4d\n", 35);
}0035
- 10 is the field-width.
- 4 is the precision.
Using precision while printing integers, floating-point numbers, and strings
#include <stdio.h>
int main()
{
int i = 873;
double f = 123.94536;
char s[] = "Happy Birthday";
printf( "Using precision for integers\n" );
printf( "\t%.4d\n\t%.9d\n\n", i, i );
printf( "Using precision for floating-point numbers\n" );
printf( "\t%.3f\n\t%.3e\n\t%.3g\n\n", f, f, f );
printf( "Using precision for strings\n" );
printf( "\t%.11s\n", s );
return 0;
}Using precision for integers
0873
000000873
Using precision for floating-point numbers
123.945
1.239e+02
124
Using precision for strings
Happy Birth
