write var to和write (var) to的区别

1.用write var to target中var可以是其他类型target限定字符型，但write (var) to target此时var和target都必须是字符型

2.用write (var) to target会把var对应的变量的值赋给target.

以下程序能说明问题

REPORT demo_data_write .
DATA: number TYPE f VALUE '4.3',
      text(10) TYPE c,
      float TYPE f,
      pack  TYPE p DECIMALS 1.
WRITE number.
WRITE number TO text EXPONENT 2.
WRITE / text.
MOVE number TO pack.
WRITE / pack.
ULINE.
DATA: name(10)   TYPE c VALUE 'SOURCE',
      source(10) TYPE c VALUE 'Antony',
      target(10) TYPE c.
WRITE (name) TO target.
WRITE target.