Check out example codes for "format specifier fro float in printf". It will help you in understanding the concepts better.

Code Example 1

printf("%0k.yf" float_variable_name)  Here k is the total number of characters you want to get printed. k = x + 1 + y (+ 1 for the dot) and float_variable_name is the float variable that you want to get printed.  Suppose you want to print x digits before the decimal point and y digits after it. Now, if the number of digits before float_variable_name is less than x, then it will automatically prepend that many zeroes before it.

Code Example 2

/* printf example in C */ #include <stdio.h>  int main() {    printf ("Characters: %c %c \n", 'a', 65);    printf ("Decimals: %d %ld\n", 1977, 650000L);    printf ("Preceding with blanks: %10d \n", 1977);    printf ("Preceding with zeros: %010d \n", 1977);    printf ("Some different radices: %d %x %o %#x %#o \n", 100, 100, 100, 100, 100);    printf ("floats: %4.2f %+.0e %E \n", 3.1416, 3.1416, 3.1416);    printf ("Width trick: %*d \n", 5, 10);    printf ("%s \n", "A string");       return 0; }   //*******  Characters: a A Decimals: 1977 650000 Preceding with blanks:       1977 Preceding with zeros: 0000001977 Some different radices: 100 64 144 0x64 0144 floats: 3.14 +3e+000 3.141600E+000 Width trick:    10 A string

Code Example 3

printf("%.6f", myFloat);

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