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String operators
Provides a reference of string operators.
Table 29. String operators
Syntax
Effect
string1 + string2
Returns a string containing the
concatenation of string1 and string2.
Examples:"Hello," + " world" –> "Hello,
world"
When the operator + is used to add a string
to a nonstring value, the nonstring value is
first converted to a string.
Examples:
"Your age is " + 23 –> "Your age is 23"
23 + " is your age" –> "23 is your age"
string1 == string2
string1 != string2
The operator == returns the Boolean true if
string1 and string2 are identical, and false
otherwise. Two strings are identical if they
have the same length and contain the same
sequence of characters. The operator != is
the converse of ==.
Examples:
"a string" == "a string" –> true
"a string" == "another string" –> false
"a string" == "A STRING" –> false
"a string" != "a string" –> false
"a string" != "another string" –> true
When the operators == and != are used to
compare a string with a number, the string
is first converted to a number and the two
numbers are compared numerically.
Examples:
"12" == "+12" –> false
12 == "+12" –> true
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OPL Language Reference Manual