\begin{center} Text on line 1 \\ Text on line 2 \\ . . . \end{center} The center environment allows you to create a paragraph consisting of lines that are centered within the left and right margins on the current page. Each line must be terminated with a \\.
1 – \centering
This declaration corresponds to the center environment. This declaration can be used inside an environment such as quote or in a parbox. The text of a figure or table can be centered on the page by putting a \centering command at the beginning of the figure or table environment. Unlike the center environment, the \centering command does not start a new paragraph; it simply changes how LaTeX formats paragraph units. To affect a paragraph unit's format, the scope of the declaration must contain the blank line or \end command (of an environment like quote) that ends the paragraph unit.