printf

void  printf(string format, ...)

The format string is a simpler version of the C printf format string. When a % symbol is found in the string, an argument will be printed out in a format specified by the characters following the % symbol. The conversion of the argument is specified by a single letter: g, f, s, d, x, c, p.

You can prefix the format option with an optional prefix characters to control the formatting of the output. The general form of a prefix is [flags][width][.precision][format], where Flags can be:

• -: The result will be left justified in the field
• +: A numeric value will be prefixed with either + for positive values. A non-standard behavior of this flag is that string arguments will be quoted when the + flag is set.
• 0: For numeric values, leading zeros are used to pad the field.

Width

The width can be specified by one or more decimal digits. Alternately, if an asterisk (*) is given, the width will be taken from the next value in the printf argument list.

Precision

The precision can be specified by one or more decimal digits. Alternately, if an asterisk (*) is given, the width will be taken from the next value in the printf argument list.

The different format characters supported are

%g, %p, %c

Print an integer float, vector, vector4, matrix3, matrix or string in “general” form.

%f, %e, %E

Print a float, vector, vector4, matrix3 or matrix in floating point form.

%s

Print a string.

%d, %i

Print an integer variable in decimal.

%x, %X

Print an integer variable in hexidecimal. The value will be prefixed with “0x” (i.e. 0×42).

%o

Print an integer variable in octal.

%%

Print a percent sign (%).

Examples

examples

printf("P = %g, dot(N, P) = %g, %d = %x\n", P, dot(N, P), ptnum, ptnum);
printf("RGB = {%g,%g,%g}\n", clr.r, clr.g, clr.b);
printf("P = %20s\n", "20 chars");
printf("%-+20s\n", "Left justified and quoted");
printf("%+08.3g\n", velocity);
printf("%*.*g\n", width, precision, value);
Cf = texture(sprintf("/maps/map%d.rat", i));
Cf = texture(sprintf("/maps/map%04d.rat", i));