why output is not 3.000000?

Question

#include <stdio.h>

int main()
{
printf("The Value is %f\n", 3);

return 0;
}

Answer 1

The data (3) is an integer literal (no decimal point), use a floating point literal e.g. 3.0 instead.

Type mismatch between the format specifier and the data to be printed causes unpredictable behaviour.

Answer 2

Write this code instead.

printf("The Value is %f\n", (double)3);