Ok so if i set a=1. Then a <3 so a*2 = 1*2 = 2. If i repeat this process 10 times , what do i have to do with the a value each time. Add them up ? 2 *10= 20 which is option c) which is wrong. The correct answer is e) 15.Office_Shredder said:
There is no instructionTesla In Person said:
set a to 1, the instruction inside the loop is change a by 1. What is the value of a the first time it reaches this instruction?I thought "change a by 1" meant replace the value of 5 by 1.pbuk said:
You are not the first person to have been caught out by that, it's a confusing "feature" of Scratch.Tesla In Person said:
Yes.Tesla In Person said:
So we add 1 ? It becomes 6 and 6 is not smaller then 3 so we go back and keep adding 1 ? Repeating this 10 times gives a=15 which is correct.pbuk said:
No, as already mentioned. There's a difference between "set" and "change by". "Set" replaces the old value of the variable by some new value. "Change by" adds or subtracts some value to a variable. In the program "change a by 1" adds 1 each time in the loop. If it had said "change a by -2" it would have subtracted 2 each time in the loop.Tesla In Person said:
In the program, a's value is always >= 5, so the if condition is never executed. Essentially what the code does is to increase a (which starts off at 5) by 1 ten times, which results in a's final value being 15.Tesla In Person said:
A Scratch code is a block-based coding language used in the Scratch programming environment. It allows users to create interactive stories, games, and animations by snapping together different code blocks.
To find the value of "a" at the end of a Scratch program, you can use the "set a to" block. This block allows you to assign a value to the variable "a" and you can then use the "show" block to display the value of "a" at the end of your program.
Yes, you can change the value of "a" during the program by using the "change a by" block. This block allows you to add or subtract a specific amount from the current value of "a". You can also use other mathematical operations, such as multiplication or division, to change the value of "a".
Knowing the value of "a" at the end of a program is important because it allows you to keep track of and manipulate the value of this variable throughout your program. This can be useful in creating more complex and dynamic programs.
Yes, you can use "a" in other parts of your program by using the "set a to" block or the "change a by" block. These blocks allow you to change the value of "a" and use it in different parts of your program. You can also use "a" in conditional statements, loops, and other code blocks to control the flow of your program.