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A unary function (also known as a monadic function) is a function that accepts exactly one argument. The term "unary" simply refers to the function's arity—the number of arguments it takes.
Let us take an example of unary function,
javascript
1const unaryFunction = (a) => console.log(a + 10); // This will add 10 to the input and log the result
2
3unaryFunction(5); // Output: 15In this example:
- unaryFunction takes a single parameter a, making it a unary function.
- It performs a simple operation: adding 10 to the input and printing the result.
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