In school, we use to make use of variables like x and y for algebraic operations. Similarly we make use of variables in AppleScript too.
set x to 5
Explanation: This will create a variable with the name x and assign it a value of 5. The result tab will print 5.
Figure 4.1.1 Printing Integer
set x to 5 set y to 10.5 --creates a floating point number
Explanation: This will create a variable with the name x and y and assign a value of 5 and 10.5 respectively. However the result tab will print 10.5 (the last value).
Figure 4.1.2 Printing Floating Point Number
Another important thing here is naming of variables. There is pre-defined set of rules that needs to be followed. Click here to learn more.
Just remember one thing, the variable name should not be same as a keyword used in AppleScript like say, beep, etc. It is a good practice to composite words. It is a good practice to keep the second and additional word in title case (e.g. pictureWidth, getDivisionResult, etc).
set pictureWidth to 1920 set pictureHeight to 1080 set resolution to pictureWidth * pictureHeight
Explanation: This will create a variable with the name pictureWidth and pictureHeight and assign them with a value 1920 and 1080 respectively. As specified resolution = pictureWidth x pictureHeight i.e. 1920*1080 (2073600). Hence in the result tab 2073600 will be printed.
Figure 4.1.3 Output of Multiplication