The usage of write in fortran is roughly as follows: write (device number, format). Fortran requires this device number that the data on the device number is an integer. 1 1 is an integer, and the integer variable defined by ourselves is also an integer.

Give a chestnut:

Integer:: n

n= 1 1

Write (n, *) "Hello world!"

Write "Hello world!" In the file number 1 1. This sentence.