How do we avoid compilation errors in JShell in Java 9?

JShell is an interactive tool that enables us to execute java code and display the output immediately. JShell is a REPL (read-evaluate-print-loop) tool run from the command line prompt. If we need to avoid compile errors in JShell, then we must declare these variables before using it. Error messages in JShell can use the symbols "^--^" to highlight errors.

In the following code snippet, an int variable is declared "div" Try using variables that have not been declared yet: num1 and num2, So JShell reports compilation errors indicating that the compiler cannot find these variables.

<strong>C:\Users\User>jshell
| Welcome to JShell -- Version 9.0.4
| For an introduction type: /help intro

jshell> int div = num1 / num2
|  Error:
|  cannot find symbol
|  symbol: variable num1
|  int div = num1 / num2;
|  ^--^
|  Error:
|  cannot find symbol
|  symbol: variable num2
|  int div = num1 / num2;
|  ^--^</strong>

In the following code snippet, JShell displays the names of the variables: num1 and num2 , followed by two equal signs and a greater than sign (= = >).

<strong>jshell> int num1 = 35
num1 ==> 35

jshell> int num2 = 7
num2 ==> 7

jshell> int div = num1 / num2
div ==> 5</strong>

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