Printf Scanf C Tutorial

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#include 
int main()
{ 
   int i = 873;
   double f = 123.94536;        
   char s[] = "Happy Birthday"; 
   printf( "Using precision for integers\n" );
   printf( "\t%.4d\n\t%.9d\n\n", i, i );
   printf( "Using precision for floating-point numbers\n" );
   printf( "\t%.3f\n\t%.3e\n\t%.3g\n\n", f, f, f );  
   
   printf( "Using precision for strings\n" );
   printf( "\t%.11s\n", s );
   return 0;
}
Using precision for integers
0873
000000873
Using precision for floating-point numbers
123.945
1.239e+02
124
Using precision for strings
Happy Birth