Numeric Format I
The I format prints numeric expressions in integer format. The syntax of the I format specification is:
[-|*|+] iw
where:
w
Specifies the maximum field width.
Specifying i9 prints a number up to nine characters long in integer format, including an optional sign, and left justifies it in the column by default. Specifying a plus sign (+i9) right justifies the number in the column.