Open Watcom FORTRAN 77 Language Reference

5 Character Substrings
5.1 Introduction
A substring is a contiguous portion of a character entity. The substring operation selects a substring from a
character entity. The resulting substring can then be treated as a character entity in itself. Substringing also
allows the replacement of substrings from character entities with other character entities.
5.2 Substring Names
Substrings are formed by specifying a substring name. The forms of a substring name are:
v( [ e1] : [ e2] )
a(s [,s] ...)( [ e1] : [ e2] )
where:
v
a(s[,s]...)
e1
e2
is a character variable name.
is a character array element name.
is an integer expression identifying the leftmost character of the substring.
is an integer expression identifying the rightmost character of the substring.
e1 and e2 are called substring expressions. They must be such that
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