Glossary

• counter : A variable used to count something, usually initialized to zero and then incremented.
• empty : string A string with no characters and length 0, represented by two quotation marks.
• flag : A boolean variable used to indicate whether a condition is true or false.
• invocation : A statement that calls a method.
• immutable : The property of a sequence whose items cannot be assigned.
• index : An integer value used to select an item in a sequence, such as a character in a string.
• item : One of the values in a sequence.
• method : A function that is associated with an object and called using dot notation.
• object : Something a variable can refer to. For now, you can use “object” and “value” interchangeably.
• search : A pattern of traversal that stops when it finds what it is looking for.
• sequence : An ordered set; that is, a set of values where each value is identified by an integer index.
• slice : A part of a string specified by a range of indices.
• traverse : To iterate through the items in a sequence, performing a similar operation on each.