Higher Computing Science String Handling

2. All programming languages have predefined functions which allow the
manipulation of text strings. Some examples:
LEFT – get a number of characters at the left of the string
RIGHT – get a number of characters at the right of the string
MID – get a number of characters in the middle of the string
LEN / LENGTH – get the length of the string
toUPPER & toLOWER – convert string to upper or lower case characters
TRIM – remove characters from start or end of string, or remove whitespace
from start or end of a string
Most programming languages will include many more string handling functions.
String Handling

3. String Handling
Example
Duncastle Rugby Club have a computerised system which scans membership
cards and logs the date and time of arrival of members along with the member
name and address. An example string would be:
“13:21 05012016 Johnstone 14 High St, Duncastle DC13 2BZ”
They want the program to display the arrival time of a member on screen when
they scan their card.

4. String Handling
Example

5. String Handling
Example
Note that LiveCode does not have a LEFT function, instead it works with
characters in a string

6. String Handling
Example
A program is required to count the number of times that the letter “A” appears in
an inputted block of text.

7. String Handling
Example

8. String Handling
Example
Note that LiveCode does not have a MID function, instead it works with
characters in a string