Try Catch Block
A try-catch block is used to mitigate errors in code and prevent program crashing during runtime. It 'tries' a block of code that could give an error. If the error is caught, it will execute a different block of code rather than crash the program (throw an error).
Used to declare a variable.
The while loop executes a block of code while a boolean expression evaluates to true. It terminates as soon as the expression evaluates to false. The boolean expression is evaluated before each iteration.
A function (method) is a block of code that can be called from another location in the program or class.
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