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curriculum/challenges/english/blocks/learn-lambda-functions-by-building-an-expense-tracker/6582352cbdbcde4d0c4f7b0b.md

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--description--

To call a lambda function you can use the usual function syntax with a pair of parentheses after the variable name.

Call your test lambda function and pass 3 as the argument. Then, print the result.

--hints--

You should have print(test(3)) in your code.

js
({ test: () => assert.match(code, /^print\s*\(\s*test\s*\(\s*3\s*\)\s*\)/m) })

--seed--

--seed-contents--

py
def add_expense(expenses, amount, category):
    expenses.append({'amount': amount, 'category': category})
    
def print_expenses(expenses):
    for expense in expenses:
        print(f'Amount: {expense["amount"]}, Category: {expense["category"]}')

def total_expenses(expenses):
    pass
    
--fcc-editable-region--
test = lambda x: x * 2

--fcc-editable-region--

expenses = []