William Eastwood
Final year student at University of Reading, studying Computer Science.
Activity
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Make sure you have the correct number of } to match your {s
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You need an extra bracket just after the if( as you are closing the statement before you try to do ||
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William Eastwood replied to Teddy Cummings
Unary just means the expression consisting of or involving a single component or element.
So in this case, a Unary operation (+, -, ++, --, !, ~) is performed on a single variable -
Make sure you follow these steps properly and download the JDK
https://www.futurelearn.com/courses/begin-programming/9/steps/108737 -
/* Is the the start of a comment, with */ being the end. You use this to 'comment out' a bit of code which you don't want to run for now, or to give information to someone who is reading the code
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Yeah, javac -version
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William Eastwood replied to Rishabh Patel
Which jdk did you download?
Make sure you follow the instuctions and try again. -
William Eastwood replied to Jacqui Osz
Yes, If you follow this course you'll learn how!
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William Eastwood replied to Simon MacGregor
If it works, then great! There are always many different ways to go about a solution
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William Eastwood replied to Roy Escabusa
Unary operators:
+ makes an expression positive.
- makes an expression negative.
++ increments a value by 1.
-- decrements a value by 1.
! inverts a boolean value.
~ inverts the bits of a binary number. -
William Eastwood made a comment
When downloading, there may be issues with the Gradle Sync such as 'Gradle sync failed: failed to find target android-21 :'
You should be able to follow the link to download the update and the Gradle Sync will try again.
It can be seen here the number of Sync attempts I had to make, and update the target etc. http://imgur.com/a/wF7Vj
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Make sure you type 'javac -version' rather than 'javac version' .
There is a - in there. -
javac 1.8.0_111 is the newer version, this is fine
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If you see a box like this http://imgur.com/a/gT6Sq , click new and paste in the bin address. See how i have it at the bottom of the table.
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What are you struggling with? Let's see if we can work through it together
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You can press 'new' and paste in the bin folder location - you see a more updated version where all the environment variables are in a table rather than a long string!
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You'll need to use a different device, such as your windows 8 PC
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Have you created the JAVA_HOME environment variable?
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William Eastwood replied to steven noppe
Open SDK Manager (robot behind down arrow box icon). Select the API level your error message says is missing (for example: for unknown target android-21 you need to select API 21). Now install the selected API level.
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William Eastwood replied to Kashif Wahid
Open SDK Manager (robot behind down arrow box icon). Select the API level your error message says is missing (for example: for unknown target android-19 you need to select API 19). Now install the selected API level.
