Manipulating Strings

• Concatenation is to link together text and the values in variables to create a new string value.
• A string index is an index location given to each character within a string. The index is zero based from the first character.
• A zero-based index is where the is index numbered from zero. The first character in the string will be at index zero. The final index location will always be one less than the number of characters in the string.
• Chars() is the function that will return the character at a given index location.
• IndexOf() is the function that will return the index location of a given character.
• UCASE() converts any string value to uppercase characters. LCASE() converts any string value to lowercase characters.
• Len() is the length function that can be used to return the number of characters within a string.
• Substringing is a programming method used to identify part of a string value by reference to the index locations within that string.
• SUBSTRING (“Computer Science”, 1, 8) will return ”Computer”.
• Concatenation offers the programmer a method of joining together text and the values in variables to create a new string value. This can be used to generate user-friendly output messages.
• Substringing is used to allow the programmer to identify part of a string value by reference to the index locations within that string. It can be used to identify whole words within a string.
• All the individual characters in a string can be referenced by an index location. When using pseudocode it is common to index from 1.