Functions

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A function is a block of organized, reusable code that performs a specific task. It runs only when it is called. Functions help make a program structured and easier to manage.

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Functions improve modularity, reduce repeated code, and make programs easier to understand, maintain, and debug. A large program can be divided into smaller parts, and each part can do one specific ta…

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Built-in functions are functions already present in Python and always available for use. No additional module import is needed to use them. Examples include int(), float(), input(), eval(), min(), max…

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int() converts a value into an integer. If a floating-point number is given, the decimal part is removed. If a non-numeric string is given, it causes an error. Examples: int("3") -> 3, int(34.8) -> 34…

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It results in a ValueError because 'Delhi' is a non-numeric string and cannot be converted to an integer.

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float() returns a floating-point number from a number or a numeric string. Examples: float(34) -> 34.0, float(22+23) -> 45.0, float(12+(1/4)) -> 12.75, float("33") -> 33.0.

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It results in a ValueError because the string cannot be converted to a floating-point number.

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input() accepts an input string from the user without evaluating it. Whatever is entered is converted into a string. Program flow stops until the user gives input. The prompt is optional.