lookup¶

Syntax¶

lookup(table_name,key_expression)

Parameters¶

table_name: The name of a table variable.
key_expression: An expression that evaluates to a number or to a list.

Returns¶

This action returns the value stored under the given key in the indicated table.

Description¶

This action returns the value stored under the given key in the indicated table.

If the key does not exist, a run-time error occurs unless the table has a defined default_value property, in which case the default value is returned. In that case, the default value is NOT inserted into the table as the value of the key.

This action is equivalent to table_name[key_expression].

Examples¶

The following example sets the lookup_value to 3

some_table[40] = 1
some_table[30] = 2
some_table[10] = 3
some_table[20] = 4
erase(some_table,40)
lookup_value = lookup(some_table,5*2)

or

lookup_value = some_table[5*2]