FinProg Studio

FinProg uses the let keyword to declare variables. It supports standard data types such as numbers, strings, and booleans. You can output data to the console using the print() function.

// Variable declarations
let initial_investment = 1000;
let interest_rate = 0.05;
let is_active = true;

// Arithmetic and Modulus
let doubled = initial_investment * 2;
let remainder = 10 % 3; // Evaluates to 1

// Comparison
let is_profitable = (doubled > initial_investment) && is_active;
print("Profitable? ", is_profitable);

Store lists of data in Arrays [1, 2, 3] and structured data in Objects { key: value }. FinProg supports modern dot-notation methods on strings and arrays.

// Arrays (Lists) & Methods
let cashflows = [-5000, 1200, 1500];
print("Initial Flow: ", cashflows[0]); // Access via index (0-based)

cashflows.push(1800); // Or use global push(cashflows, 1800)
print("Total Items: ", cashflows.len());

// Objects (Dictionaries)
let asset = { ticker: "AAPL", shares: 10, price: 150 };
print(f"Company {asset.ticker.toUpper()} value is \${asset.shares * asset.price}");

// Modifying objects
asset.price = 160; 
print("Updated Value: $", asset.shares * asset.price);

Control the execution of your logic using standard conditional statements, ternary operators, and loops. FinProg's engine safely handles infinite or massive loops without crashing the browser.

// Conditionals
let roi = 0.12;
if (roi > 0.15) {
    print("Excellent Return");
} else if (roi > 0.08) {
    print("Good Return");
} else {
    print("Needs Improvement");
}

// Inline Ternary logic
let status = roi > 0 ? "Profit" : "Loss";

// For Loop (Initialization; Condition; Update)
for (let i = 1; i <= 3; i = i + 1) {
    print(f"Year {i} projection");
}

// While Loop
let balance = 1000;
while (balance < 2000) {
    balance = balance * 1.05; // 5% growth
}

Create blocks of code using the func keyword. Use arrow functions (x) => x*2 for fast inline logic. You can even interact with the user via input()!

// Define a function
func calculateTax(amount, rate) {
    if (amount <= 0) { return 0; }
    return amount * rate;
}

// Lambda / Arrow Function
let double = x => x * 2;
print("10 doubled is ", double(10));

// Interactive Prompt
let user_val = input("Enter your tax rate (e.g. 0.20):");
print("Tax: $", calculateTax(50000, user_val));

// Error Handling
try {
    let bad_math = 100 / 0;
} catch (err) {
    print("Caught an execution error: ", err);
}

// Importing external modules
// (Assuming you saved a file named 'my_utils.fin' in the IDE)
import "my_utils.fin";