freecodecamp: javascript debugging

I note that passed code to help coder find the solution

Use the JavaScript Console to Check the Value of a Variable

"console.log(a);"

Understanding the Differences between the freeCodeCamp and Browser Console

"console.log(outputTwo);

console.clear();

console.log(outputOne);

"

Use typeof to Check the Type of a Variable

"console.log(typeof(seven));

console.log(typeof(three));"

Catch Misspelled Variable and Function Names

"" //copy &past variable

Catch Unclosed Parentheses, Brackets, Braces and Quotes

"let myArray = [1, 2, 3];

let arraySum = myArray.reduce((previous, current) => previous + current);"

Catch Mixed Usage of Single and Double Quotes

"let innerHtml = "<p>Click here to <a href=\"#Home\">return home</a></p>";"

Catch Use of Assignment Operator Instead of Equality Operator

"if(x == y)"

Catch Missing Open and Closing Parenthesis After a Function Call

"let result = getNine();"

Catch Arguments Passed in the Wrong Order When Calling a Function

"let power = raiseToPower(base,exp);"

Catch Off By One Errors When Using Indexing

"for (let i = 0; i < len; i++)"

Use Caution When Reinitializing Variables Inside a Loop

"function zeroArray(m, n) {

// Creates a 2-D array with m rows and n columns of zeroes

let newArray = [];

const row = [];

for (let j = 0; j < n; j++) {

// Pushes n zeroes into the current row to create the columns

row.push(0);

}

for (let i = 0; i <m; i++) {

// Adds the m-th row into newArray

// Pushes the current row, which now has n zeroes in it, to the array

newArray.push(row);

}

return newArray;

}

let matrix = zeroArray(3, 2);

console.log(matrix);"

Prevent Infinite Loops with a Valid Terminal Condition

"for (let i = 1; i <= 4; i += 2)"