3 Types of Statement
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
|
|
||||
|---|---|---|---|---|---|
| Initialisation | Setting starting values of variables before the variable is used in an expression as the variable may have previous values from a previous run. E.g. Totals & Counts must be set to zero.
🗑
|
||||
| Assignment | Sets the value of a variable. Can be written X = 0 or X 0 or X := 0.
🗑
|
||||
| Assignment/Comparison | Notice the difference between the = in X = 5 (assignment operator) and IF X = 5 (comparison operator).
🗑
|
||||
| Comparing Strings | Comparison of strings uses their character codes. Compares first characters code in the two strings if they are the same then the next character in the two strings is compared etc. Upper and lower case letters have different character codes.
🗑
|
||||
| Complex Boolean expressions | IF Colour = “Red” OR “Black” is an error (although not syntactically). It should be IF Colour = “Red” OR Colour = “Black”.
🗑
|
||||
| Operator Precedence | The default order in which operations in an expression are carried out. E.g. Division or multiplication done first and subtraction is done last.
🗑
|
Review the information in the table. When you are ready to quiz yourself you can hide individual columns or the entire table. Then you can click on the empty cells to reveal the answer. Try to recall what will be displayed before clicking the empty cell.
To hide a column, click on the column name.
To hide the entire table, click on the "Hide All" button.
You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
To hide a column, click on the column name.
To hide the entire table, click on the "Hide All" button.
You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.
Normal Size Small Size show me how
Normal Size Small Size show me how
Created by:
Chelsea2760
Popular Computers sets