Fundamentals of Web Programming Pre-Final CS

Function

A separate piece of code intended to perform a specific task. It is usually assigned a specific name that is called many times in different program sections.

return keyword

Causes the function to end exactly wherever this word is placed in the instruction. It allows programmers to return a given value from inside the function to the place where it was called.

local variable

Only usable inside its corresponding function block.

global variable

It is usable anywhere in the program.

Parameters

Are names separated by commas, placed inside the parenthesis after the function name, and treated as local variables.

Errors

It is the operation of programs happen due to misconceptions when solving a problem, improper use and typos of the programming language, or the inability to predict user behavior.

syntax

what is the grammar in the programming language?

keywords

what is the vocabulary of programming language?

Arguments

Actual values passed to a function when called (e.g., `add(5, 7)`).

SyntaxError

appears when a code is ill-formed. When typos occur, or when unmatching parenthesis or brackets.

ReferenceError

This error occurs when the programmer tries to access a function or a variable that does not exist.

TypeError

This error occurs when a specific value is not of the expected type, such as changing the constant value or checking the length of a variable that is not a string.

RangeError

This error generated when a value is passed to a function outside its acceptable range.

Exception

Runtime error that interrupts program execution unless handled.

try...catch

Statement to handle exceptions; try runs code, catch handles errors.

finally

Optional block in try...catch that executes regardless of errors.

Debugging

Process of identifying and fixing errors using tools like console.log or debugger.

Breakpoint

Pauses code execution at a specific line for inspection (e.g., debugger;).

Resume

The debugger runs the program and "breaks" on user-defined breakpoints.

Step Into

Debugger action to enter and execute each line of a function.

Step Over

Debugger action to execute a function call without entering its details.

Step Out

Debugger action to exit the current function and resume execution.