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    How to Type Math

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    • debbieD
      debbie ADMIN M0★ M1 M5
      last edited by debbie

      Latex code looks like a bunch of unintelligible gibberish when you look at it, but over time, you might grow to love it! Latex allows you to write math seamlessly into your English text without leaving your keyboard! Plus, it's \(\textcolor{purple}{\text{ pretty}}.\) And it's powerful. Learn to write Latex, and you'll be a happier math person!


      How to get into math mode:

      Typing the double backslash "\\", typing the double dollar-sign " $$ " and clicking the arrow-X in the menu above all put you into math mode. Just remember that whichever you choose to open your math with should be the same thing that you use to close your math with.

      The "%" math mode

      Clicking on the "%" icon above the post editor will automatically give you the math mode wrapper of "'''"s.

      forum-math-mode.png
      The wrapper comes with a very fancy sophisticated code example, highlighted in \(\textcolor{blue}{\text{ blue }}.\) Go ahead and delete this, because you are about to put in your own fancy sophisticated code. 😉

      forum-apostrophe-math-mode-preset-code.png

      Type your code directly inside this wrapper. Please keep in mind that to make a new line, typing "enter" won't automatically do it for you. You will have to type two backslashes at the end of each line.

      3 \times 4 \\
      x \times y \times y \\
      0.5 \times 1.\overline{111} 
      

      forum-apostrophe-math-mode.png

      The backslash method

      I personally like to use the backslashes because I find it easier to keep my hands on the keyboard without having to go for the mouse. With this method, you must type in the "wrapper" yourself. This is two backslashes, followed by an open parentheses / close parentheses. If you use curvy brackets, you get inline Latex that can sit inside your sentence.

      There are random math \\(x^2\\) symbols \\(2^2\\) appearing \\(\frac{1}{2}\\) in this \\(x^y\\) sentence. 
      

      forum-inline-latex.png

      If you use square brackets, you get Latex on its own line.

      There are random math \\[x^2\\] symbols \\[2^2\\] appearing \\[frac{1}{2}\\] in this \\[x^y\\] sentence. 
      

      forum-square-brackets.png

      The Dollar-Sign Approach

      Typing two dollar signs will also open and close your Latex code. However, it gives e x t r a h u g e spacing, and will set the math on its own line.

      3 \times 4 
      x \times 4 \times y
      0.5 \times 1.\overline{1111} 
      

      forum-dollar-sign-math-mode.png


      Latex Examples

      3 \times 4 
      x \times 4 \times y 
      0.5 \times 1.\overline{1111}  
      

      With wrapper:
      screenshot-forum-times2.png

      3 + 2 = 5 
      3 + 2 \neq 4 
      3 + 2 > 5 
      3 + 2 \geq 4 
      2 + 2 \leq 5 
      
      2 + 2 = 4 
      3 + 2 > 4 
      

      With wrapper:
      Screenshot-forum-inequalities2.png

      When typing fractions, it helps to first type the empty braces, like this:

      \frac{}{}
      

      before you enter the values into the braces.

      \frac{123456}{7890}
      

      This way, you're less likely to make a typo!

       \frac{1}{2} 
       \frac{1}{2 + x} 
       \frac{\frac{1}{2}}{x} 
       \frac{1}{2} \times \frac{x}{3} 
       \frac{1}{2} = x 
      

      With wrapper:
      screenshot-forum-fractions2.png

      Superscripts, subscripts and degree notation. Remember that if the superscript or subscript is more than one digit, you need braces { } around it.

      x^2 
      x^{30}
      360^{\circ} 
      x_1, x_2, x_3, ldots 
      x_{20} 
      
      

      With wrapper:
      screenshot-forum-superscripts2.png

      Geometric symbols:

       \angle ABC 
       \bigtriangleup ABC 
       \overline{AB} = 3 
       x \approx 3 
       \angle A = 30^{\circ} 
       \frac{ \overline{AB}}{\overline{BC}} = 2 
      

      With wrapper:
      screenshot-forum-geometry2.png

      Aligned equation blocks:

      \begin{aligned}
      3x + 2 &= 7 \\
      6x + 4 &= 14 \\
      x &= \frac{5}{3} 
      \end{aligned}
      

      With wrapper:
      screenshot-forum-aligned-equations2.png

      debbieD 1 Reply Last reply Reply Quote 7
      • debbieD
        debbie ADMIN M0★ M1 M5
        last edited by

        This post is deleted!
        1 Reply Last reply Reply Quote 0
        • debbieD
          debbie ADMIN M0★ M1 M5 @debbie
          last edited by debbie

          When you want to type a $ or % symbol in Latex, you must put two backslashes before it:

          \\$ 40
          50 \\% 
          \\# 5 
          

          forum-math-guide-percents.png

          1 Reply Last reply Reply Quote 1
          • debbieD
            debbie ADMIN M0★ M1 M5
            last edited by debbie

            Additionally, to make colored text, you can use the "color{colorname}" command within math mode. Everything you enter until the end of the math mode will render in the color name entered as colorname.

            ````math
            \color{red} \text{Latex does not regard spaces:} 1 2 3 4 5 6 
            \color{blue} Text written without the \text{ \text{command} } formatting looks squished like this 
            \color{green} \text{ A green equation: } \frac{a + b}{c} + 2.5 - x^2 
            \color{purple} \text{ Purple text using the command 'text'} \\) 
            
            

            forum-math-guide-colored-text1.png

            forum-math-guide-colored-text2.png

            1 Reply Last reply Reply Quote 3
            • debbieD
              debbie ADMIN M0★ M1 M5
              last edited by debbie

              forum-how-to-type-math-sqrt.png

              1 Reply Last reply Reply Quote 2
              • S
                spaceblastxy1428 M1★ M3★ M4 M5★
                last edited by

                \(\color{lightgray} \text{This post is deleted!}\)

                1 Reply Last reply Reply Quote 7
                • Potato2017P
                  Potato2017 M5★
                  last edited by

                  \(\color{lightgray}\text{This post is deleted!}\)

                  The best Potato
                  aops: Potato2017
                  yt: http://bit.ly/potatosubscribe
                  discord: Potato2017#1822 (it's tent#0001 now)
                  tetr.io: https://ch.tetr.io/u/potato2017
                  -Potato2017

                  1 Reply Last reply Reply Quote 3
                  • divinedolphinD
                    divinedolphin M0★ M1★ M2★ M3★ M4★ M5★ M6★
                    last edited by divinedolphin

                    \(\footnotesize\color{lightgray} \text{This post is deleted!}\)

                    👕👕👕👕👕👕👕👕👕👕🍌🍌🍌🍌🍌🍌🍌🍌🍌🍌

                    divinedolphinD 1 Reply Last reply Reply Quote 4
                    • divinedolphinD
                      divinedolphin M0★ M1★ M2★ M3★ M4★ M5★ M6★ @divinedolphin
                      last edited by divinedolphin

                      \(\small\color{lightgray} \text{This post is deleted!}\)
                      Hmmm.... How do you change the font?

                      👕👕👕👕👕👕👕👕👕👕🍌🍌🍌🍌🍌🍌🍌🍌🍌🍌

                      debbieD divinedolphinD 2 Replies Last reply Reply Quote 4
                      • debbieD
                        debbie ADMIN M0★ M1 M5 @divinedolphin
                        last edited by

                        @divinedolphin I'd suggest searching for "Markdown change font." Markdown is the language that this forum uses, and it's a shorthand form of html code. I don't know how to do this myself, sorry! 🙂 I hope you have luck finding the answer!

                        1 Reply Last reply Reply Quote 5
                        • RZ923R
                          RZ923 M0★ M2★ M3★ M4★ M5
                          last edited by

                          \( \color{gray} \text{This post is}\) \( \color{black} \text{not}\) \( \color{gray} \text{deleted.}\)
                          Lol 😂

                          Very Interesting

                          1 Reply Last reply Reply Quote 4
                          • The Blade DancerT
                            The Blade Dancer M0★ M1★ M2★ M3★ M4 M5
                            last edited by

                            Does the sigma function work here?

                            The Blade Dancer
                            League of Legends, Valorant: Harlem Charades (#NA1)
                            Discord: Change nickname if gay#7585

                            debbieD 1 Reply Last reply Reply Quote 3
                            • debbieD
                              debbie ADMIN M0★ M1 M5 @The Blade Dancer
                              last edited by debbie

                              @The-Rogue-Blade

                              Thanks for asking! You can type the Sigma \( \sum \) by itself like this:

                              \\( \sum \\) 
                              

                              or as the sum of a sequence of terms, like this:

                              \\( \sum_{n=1}^{n=10} n^2  \\) 
                              

                              \( \sum_{n=1}^{n=10} n^2 \)

                              \\( \sum_{n=1}^{\infty} n^2  \\) 
                              

                              \( \sum_{n=1}^{\infty} n^2 \)

                              I hope this helps! 🙂

                              1 Reply Last reply Reply Quote 5
                              • divinedolphinD
                                divinedolphin M0★ M1★ M2★ M3★ M4★ M5★ M6★ @divinedolphin
                                last edited by divinedolphin

                                \[\LaTeX\]

                                \[\text{L}^\text{A}\text{T}_\text{E}\text{X}\]

                                \[L^AT_EX\]

                                👕👕👕👕👕👕👕👕👕👕🍌🍌🍌🍌🍌🍌🍌🍌🍌🍌

                                divinedolphinD 3 Replies Last reply Reply Quote 2
                                • divinedolphinD
                                  divinedolphin M0★ M1★ M2★ M3★ M4★ M5★ M6★ @divinedolphin
                                  last edited by

                                  @divinedolphin How come that post still shows up as code? When I edit it the preview shows up fine, but this is what I see right now.2020-08-12 11_47_13-How to Type Math _ Forum — Daily Challenge.png

                                  👕👕👕👕👕👕👕👕👕👕🍌🍌🍌🍌🍌🍌🍌🍌🍌🍌

                                  debbieD 1 Reply Last reply Reply Quote 4
                                  • debbieD
                                    debbie ADMIN M0★ M1 M5 @divinedolphin
                                    last edited by

                                    @divinedolphin Try this instead:

                                    \(LaTeX\)

                                    \(\text{L}^\text{A}\text{T}_\text{E}\text{X}\)

                                    \\(LaTeX\\)
                                    
                                    \\(\text{L}^\text{A}\text{T}_\text{E}\text{X}\\) 
                                    

                                    🙂

                                    1 Reply Last reply Reply Quote 4
                                    • divinedolphinD
                                      divinedolphin M0★ M1★ M2★ M3★ M4★ M5★ M6★ @divinedolphin
                                      last edited by divinedolphin

                                      62464930-7a01-4839-bb73-2b26c932b242-image.png

                                      👕👕👕👕👕👕👕👕👕👕🍌🍌🍌🍌🍌🍌🍌🍌🍌🍌

                                      debbieD 1 Reply Last reply Reply Quote 3
                                      • debbieD
                                        debbie ADMIN M0★ M1 M5 @divinedolphin
                                        last edited by

                                        @divinedolphin Yes, I've noticed that too; the square brackets don't seem to render. I usually use the double backslash with the round brackets. 🙂

                                        1 Reply Last reply Reply Quote 4
                                        • divinedolphinD
                                          divinedolphin M0★ M1★ M2★ M3★ M4★ M5★ M6★ @divinedolphin
                                          last edited by

                                          \(\LaTeX\)
                                          \(\text{L}^\text{A}\text{T}_\text{E}\text{X}\)
                                          \(L^AT_EX\)

                                          👕👕👕👕👕👕👕👕👕👕🍌🍌🍌🍌🍌🍌🍌🍌🍌🍌

                                          debbieD 1 Reply Last reply Reply Quote 4
                                          • debbieD
                                            debbie ADMIN M0★ M1 M5 @divinedolphin
                                            last edited by

                                            @divinedolphin Yay, you did it! 🎉

                                            1 Reply Last reply Reply Quote 5

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