Intel® Fortran Compiler 17.0 Developer Guide and Reference
The EN data edit descriptor transfers values by using engineering notation. It takes the following form:
ENw.d[Ee]
The value of d (the number of places after the decimal point) plus e (the number of digits in the exponent) must not exceed the value of w (the field width).
The specified I/O list item must be of type real, or it must be the real or imaginary part of a complex type.
On input, the EN data edit descriptor transfers w characters from an external field and assigns their real value to the corresponding I/O list item. The EN descriptor interprets and assigns input data in the same way as the F data edit descriptor.
The following shows input using the EN edit descriptor (the symbol ^ represents a nonprinting blank character):
Format Input Value EN11.3 ^^5.321E+00 5.32100 EN11.3 -600.00E-03 -.60000 EN12.3 ^^^3.150E-03 .00315 EN12.3 ^^^3.829E+03 3829.0
On output, the EN data edit descriptor transfers the real value of the corresponding I/O list item, right-justified and rounded to d decimal positions, to an external field that is w characters long. The real value is output in engineering notation, where the decimal exponent is divisible by 3 and the absolute value of the significand is greater than or equal to 1 and less than 1000 (unless the output value is zero).
The w should be greater than or equal to d+9 to allow for the following:
A sign (optional if the value is positive and descriptor SP is not in effect)
One to three digits to the left of the decimal point
The decimal point
The d digits to the right of the decimal point
The exponent
The exponent takes one of the following forms:
Edit Descriptor |
Absolute Value of Exponent |
Positive Form of Exponent |
Negative Form of Exponent |
|---|---|---|---|
ENw.d |
|exp| 99 |
E+nn |
E-nn |
99 < |exp| 999 |
+nnn |
-nnn |
|
ENw.dEe |
|exp| 10e - 1 |
E+n1n2...ne |
E-n1n2...ne |
If an exponent exceeds its specified or implied width, or the number of characters produced exceeds the field width, the entire field of width w is filled with asterisks. However, the field width is not filled with asterisks if the field width is exceeded when optional characters are omitted.
The exponent field width (e) is optional; if omitted, the default value is 2. If e is specified, the w should be greater than or equal to d + e + 5.
For an internal value that is an IEEE infinity or an IEEE NaN, the form of the output field is the same as for Fw.d.
The following shows output using the EN edit descriptor (the symbol ^ represents a nonprinting blank character):
Format Value Output EN11.2 475867.222 ^475.87E+03 EN11.5 475867.222 *********** EN12.3 0.00069 ^690.000E-06 EN10.3 -0.5555 ********** EN11.2 0.0 ^000.00E-03