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Programming in D: The Ultimate Guide for Software Engineers

Format Specifiers: Width, Separator, Precision and Flags

Explore how to format output in D programming by understanding the use of width, separators, precision, and flags in format specifiers. Gain skills to customize how data is displayed for better readability and control.

We'll cover the following...

Width

This part determines the width in characters that the argument is displayed in. If the width is specified as the character *, then the actual width value is read from the next argument (that argument must be an int). If width is a negative value, then the - flag is assumed.

D
import std.stdio;
void main() {
    int value = 100;
    writefln("In a field of 10 characters:%10s", value); 
    writefln("In a field of 5 characters :%5s", value);
    
}

Separator

The comma character is used to separate digits of a number in groups. The default number of digits in a group is 3, but it can be ...