using System;
using System.Globalization;
class Program
{
static void Main()
{
Console.WriteLine("=== BASIC PLACEHOLDERS ===");
string name = "Daisy";
int age = 27;
Console.WriteLine(string.Format("My name is {0} and I am {1} years old.", name, age));
Console.WriteLine(Environment.NewLine + "=== NUMBER FORMATTING ===");
double price = 1234.56789;
Console.WriteLine(string.Format("Fixed-point: {0:F2}", price));
Console.WriteLine(string.Format("Number with commas: {0:N2}", price));
Console.WriteLine(string.Format("Currency: {0:C}", price));
Console.WriteLine(string.Format("Percent: {0:P1}", 0.985));
Console.WriteLine(Environment.NewLine + "=== ALIGNMENT ===");
Console.WriteLine(string.Format("|{0,10}|", "Tessa")); // right align
Console.WriteLine(string.Format("|{0,-10}|", "Tessa")); // left align
Console.WriteLine(Environment.NewLine + "=== CUSTOM NUMERIC FORMATS ===");
Console.WriteLine(string.Format("Custom: {0:00000.00}", price));
Console.WriteLine(string.Format("Hex: {0:X}", 255));
Console.WriteLine(Environment.NewLine + "=== DATE/TIME FORMATTING ===");
DateTime now = DateTime.Now;
Console.WriteLine(string.Format("Short date: {0:d}", now));
Console.WriteLine(string.Format("Long date: {0:D}", now));
Console.WriteLine(string.Format("ISO: {0:yyyy-MM-dd HH:mm:ss}", now));
Console.WriteLine(Environment.NewLine + "=== CULTURE-SPECIFIC FORMATTING ===");
CultureInfo ro = new CultureInfo("ro-RO");
Console.WriteLine(string.Format(ro, "Currency (RO): {0:C}", price));
Console.WriteLine(Environment.NewLine + "=== NESTED EXPRESSIONS ===");
Console.WriteLine(string.Format("Uppercase: {0}", name.ToUpper()));
Console.WriteLine(Environment.NewLine + "=== INDEXED ARGUMENTS (REORDERING) ===");
Console.WriteLine(string.Format("Second: {1}, First: {0}", "Isla", "Zoe"));
Console.WriteLine(Environment.NewLine + "=== ESCAPING BRACES ===");
Console.WriteLine(string.Format("Use {{ and }} to escape braces: {{0}}"));
}
}
/*
run:
=== BASIC PLACEHOLDERS ===
My name is Daisy and I am 27 years old.
=== NUMBER FORMATTING ===
Fixed-point: 1234.57
Number with commas: 1,234.57
Currency: $1,234.57
Percent: 98.5 %
=== ALIGNMENT ===
| Tessa|
|Tessa |
=== CUSTOM NUMERIC FORMATS ===
Custom: 01234.57
Hex: FF
=== DATE/TIME FORMATTING ===
Short date: 5/9/2026
Long date: Saturday, May 9, 2026
ISO: 2026-05-09 15:13:09
=== CULTURE-SPECIFIC FORMATTING ===
Currency (RO): 1.234,57 RON
=== NESTED EXPRESSIONS ===
Uppercase: DAISY
=== INDEXED ARGUMENTS (REORDERING) ===
Second: Zoe, First: Isla
=== ESCAPING BRACES ===
Use { and } to escape braces: {0}
*/
