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  1. #include <stdio.h>
  2.  
  3. int main(void) {
  4. int a,n,i;
  5. scanf("%d",&n);
  6. printf("%d!= ",n);
  7. a=n;
  8. for(i=n-1;i>0;i--){
  9. a *=i;
  10. }
  11. printf("%d",a);
  12. return 0;
  13. }
  14.  
Success #stdin #stdout 0s 5308KB
stdin
4
stdout
4!= 24