The control characters of print format are very rich, but they are not commonly used. Generally speaking, "I, F, E, A, X" is the most commonly used format.

Iw[。 M] Output an integer with the width of w characters, and at least output m numbers.

Such as: write(*, "(I5)") 100 Output: _100; The first two spaces

Fw.d outputs floating-point numbers in the W-character text box, and the decimal part is D-character wide. If the output text box is set incorrectly, an * sign will appear.

Such as: write (*, "(F9.3)") 123.45 output: _123.450; The first two spaces, followed by 0

Ew.d[Ee] uses scientific counting method to output floating-point numbers with a width of w characters, with the decimal part accounting for d characters and the exponential part outputting at least e numbers.

Such as: write (*, "(e 15.7)" 123.45 output: _ _ 0.1234500e+03; If the output is not 15 characters, fill in spaces, and if the decimal part is less than 7 digits, fill in 0.

The usage of Dw.d is the same as that of Ew.d, except that the letter used to represent the index is changed from e to d when outputting.