04-03: Multi-Currency Converter

Home  |  All Projects  |  Notes  |  Exercises  |  Quiz Hub

Converts amounts between BDT, USD, EUR, GBP, JPY, and INR using a "BDT as base" dictionary approach. Supports a live rate table and formatted output with correct decimal places per currency.

Topics covered: dictionaries · arithmetic · functions · f-string format spec · while loop · input validation · float() type conversion

Difficulty: ⭐ Beginner

---

How to Run

python main.py

No external libraries — pure Python 3.

---

Sample Output

═══════════════════════════════════════════════════════
         Multi-Currency Converter
═══════════════════════════════════════════════════════

Options:
  1. Convert an amount
  2. Show rate table
  3. Quit

Choose (1 / 2 / 3): 1

Amount to convert: 1000
  Available currencies: BDT, USD, EUR, GBP, JPY, INR
From currency: USD
To currency  : BDT

──────────────────────────────────────────────────────
  $1,000.00 USD
  =  ৳110,000.00 BDT
──────────────────────────────────────────────────────
  Rate: 1 USD = ৳110.00 BDT

---

Key Concepts Practised

Concept	Where used
Dictionary lookup	RATES_TO_BDT[code]
Two-step conversion via base currency	convert()
f-string format spec (,.2f)	format_amount()
while True menu loop	Main loop
float() + .replace(",","")	Accepting comma-formatted numbers
Named constants	RATES_TO_BDT, SYMBOLS, DECIMALS