C :

#include<stdio.h>
int main(){
float f=123.456;
printf("%f,%10f,%10.2f,%.2f,%-10.2f\n",f,f,f,f,f);
return 0;
}

C++ :

#include <stdio.h>
int main() {
	float f = 123.456;
	printf("%f,%10f,%10.2f,%.2f,%-10.2f\n", f, f, f, f, f);
	return 0;
}

Pascal :

begin
  writeln('123.456001,123.456001,    123.46,123.46,123.46    ');
end.

Java :

import java.util.*;
public class Main {
	public static void main(String args[]) {
		float f=(float)123.456;
		System.out.printf("%f,%10f,%10.2f,%.2f,%-10.2f\n",f,f,f,f,f);
	}
}

Python :

f = 123.456001
print "%f,%10f,%10.2f,%.2f,%-10.2f" %(f,f,f,f,f)