Name Rascal/Expressions/Values/String/Subscription

Synopsis Retrieve a substring via its index.

Syntax Exp1 [ Exp2 ]

Types

Exp1	Exp2	Exp1 [ Exp2 ]
str	int	str

Description String subscription uses the integer value of Exp2 as index in the string value of Exp1. The value of Exp2 should be greater or equal 0 and less than the number of characters in the string. If this is not the case, the exception IndexOutOfBounds is thrown.

Examples Introduce a string, assign it to S and retrieve the element with index 1:

rascal>S = "abc";
str: "abc"
rascal>S[1];
str: "b"

Explore an error case:

rascal>S[5];
|stdin:///|(2,1,<1,2>,<1,3>): IndexOutOfBounds(5)
	at ___SCREEN_INSTANCE___(|stdin:///|(0,5,<1,0>,<1,5>))

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