Learn Java with Math: Using Fun Projects and Games

© Ron Dai 2019

R. DaiLearn Java with Mathhttps://doi.org/10.1007/978-1-4842-5209-3_11

11. Errors and Tips

Ron Dai¹ 

(1)

Seattle, WA, USA

 

The following is a list of common coding mistakes that beginners can easily make. It will help you overcome initial coding barriers if you are mindful of these error patterns.

• Missing half of curly braces {}.

  (It should always come with a pair.)

• Missing half of parentheses ().

  (It should always come with a pair too.)

• Missing semicolon ; at the end of each line.

• Use one = signs in a condition check.

  (Correct way is ==.)

• Assigning a value to a variable that is not defined.

  (Correct way is assigning a value to the variable only after it has been defined.)

• Defining the same variable more than once.

  int i;

  ......

  int i = 3;

  ...... ...