Check out example codes for "How to make a printf in c". It will help you in understanding the concepts better.

Code Example 1

#include <stdio.h>

int printf(const char *format, ...);

int main(void)
{
  int nb = 20;
 
  printf("Hello World !\n");
  printf("%d\n", nb);
  printf("%s/%d\n", "Nice", 20);
  return (0);
}

/// output :
///
///	Hello World !
///	20
///	Nice/20
///

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