LearnStreet Sample Solution Sudoku Solver Project Method 2

function isPossibleColumn(sudoku, col, number) {
    // This is a lot like isPossibleRow() above: it returns true if the 'number'
    // argument is NOT already in the column of the 'sudoku' indexed
    // by the 'col' argument . This would mean that adding the
    // 'number' to the 'col' for this 'sudoku' is a potentially legal move.
    // This function should return false if the number already exists in
    // the specified column.
    // REPLACE THIS CODE WITH YOUR isPossibleColumn() METHOD
    var returnValue = true;
    for(var i=0; i<9; i++){
        if(sudoku[i][col]===number){
            returnValue = false;
        }
    }
    return returnValue;
   
}