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A simple fortran problem, asking for help, about writing, helping, tks
Let me explain:

1X means to move to the right 1 square (nX means to move to the right by n squares).

3I4 means to output 3 values per line, and each value occupies 4 grids.

The first j represents the output variable J.

J= 1, 10 means that J cycles from 1 to 10, so it is actually output 1, 2, ..., 10.

Finally, it should be output.

==== 1====2====3

====4====5====6

====7====8====9

=== 10

Equal sign = indicates a space. Of the four spaces, 1 is a space shifted by 1X, and three spaces are controlled by 3I4. Plus the number itself, each value occupies exactly four spaces.

The number of records refers to the number of rows, so it is 4.