Answer / Sanjay Kumar Maurya

A function in C is a collection of statements that performs a specific task. Here's an example of a user-defined function:

```c
#include <stdio.h>

void printHello() {
printf("Hello, World!n");
}

int main() {
printHello();
return 0;
}
```
In this example, `printHello()` is a function that prints "Hello, World!" when called from the `main()` function.

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