Python Lambda Fill-in-the-Blank Exercises | Hands-On Practice Problems

Test your Python skills with interactive fill-in-the-blank lambda function exercises. Practice lambda syntax, filtering, mapping, and real-world coding scenarios.

🔍 Fill in the Blanks

🟢 Beginner

1. In Python, a lambda function is created using the ________ keyword.
Answer

lambda

Lambda functions in Python are defined using the `lambda` keyword followed by arguments and an expression.

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2. A lambda function in Python can have any number of ________, but can only have one ________.
Answer

arguments, expression

Lambda functions can take any number of arguments, but they must consist of exactly one expression.

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3. The syntax of a lambda function is ________.
Answer

lambda arguments: expression

The syntax for a lambda function is `lambda` followed by the arguments, a colon, and then the expression.

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4. The following lambda function is used to add 10 to a number: `add_ten = ________ x: x + 10`.
Answer

lambda

This is a lambda function definition that adds 10 to the argument `x`.

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5. To multiply two numbers using a lambda function, the correct syntax would be `mul = ________ a, b: a * b`.
Answer

lambda

This lambda function takes two arguments, `a` and `b`, and returns their product.

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6. The lambda function `is_even = ________ x: x % 2 == 0` checks if a number is ________.
Answer

lambda, even

This lambda function checks if the number `x` is divisible by 2 (i.e., even).

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7. Lambda functions are often used when you need a ________ function without the need to formally define one.
Answer

small

Lambda functions are typically used for small, one-off functions that are not reused elsewhere in the code.

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8. A lambda function in Python can return a value without using the ________ keyword.
Answer

return

Unlike regular functions, lambda functions don't need the `return` keyword to return a result. The expression itself is the return value.

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9. The syntax of a lambda function requires a ________ after the `lambda` keyword.
Answer

list of arguments

After the `lambda` keyword, you list the arguments for the function, followed by a colon and the expression.

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🟡 Intermediate

1. A lambda function is often used as an argument to a ________ function.
Answer

higher-order

Lambda functions are often passed as arguments to higher-order functions, which are functions that take another function as an argument.

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2. In Python, lambda functions can be used with ________ functions like `map()`, `filter()`, and `reduce()`.
Answer

higher-order

Higher-order functions take another function as an argument, and lambda functions are often used in such scenarios.

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🔴 Advanced

1. In the example `(lambda x, y : x + y)(6,8)`, the lambda function is defined and then immediately ________ with two arguments.
Answer

called

This demonstrates an Immediately Invoked Function Expression (IIFE) where the lambda function is defined and called right away with the arguments `6` and `8`.

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📚 Related Resources

• Understanding Python Lambda Functions: A Comprehensive Guide

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