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  1. #include <stdio.h>
  2.  
  3. // Void function definition
  4. void hello() {
  5.     printf("GeeksforGeeks\n");
  6. }
  7.  
  8. // Return-type function definition
  9. int square(int x) {
  10.     return x * x;
  11. }
  12.  
  13. int main() {
  14.     int x;
  15.  
  16.     // Calling the void function
  17.     hello();
  18.  
  19.     // Calling the return-type function
  20.     int result = square(25);
  21.     printf("Square of %d is: %d",x, result);
  22.  
  23.     return 0;
  24. }
Success #stdin #stdout 0s 5284KB
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stdin
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stdout
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GeeksforGeeks
Square of 0 is: 625
https://ideone.com/WODS1Y
language:
C (gcc 8.3)
created:
20 hours ago
visibility:
public

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