How to print star pattern in JavaScript in a very simple manner

Question

I have tried the code below but it s output is not proper    x000D   x000D  for i 5 i gt  1 i--    x000D      for j i j gt  1 j--   x000D          console log j   x000D        x000D          console log   n    x000D    x000D   x000D   x000D

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x000D   x000D                  -------------- x000D   x000D                        x000D                        x000D                        x000D                        x000D                        x000D                        x000D                        x000D                        x000D                        x000D   x000D   x000D              ----------------   x000D   x000D              let y   10  x000D              let x   10  x000D   x000D              let str       x000D   x000D              for let i   1  i  lt  y  i      x000D                  for let j   1  j  lt  x  j     x000D                      if i   j  gt   y   x000D                          str   str concat       x000D                       else  x000D                          str   str concat      x000D                        x000D                    x000D                  str   str concat   n   x000D                x000D   x000D              console log str  x000D   x000D   x000D                                         x000D   x000D   x000D   x000D                        x000D                        x000D                        x000D                        x000D                        x000D                        x000D                        x000D                        x000D                        x000D   x000D   x000D                                         x000D   x000D              let str2       x000D   x000D              for let i   1  i  lt  y  i      x000D                  for let j   1  j  lt  x  j     x000D                      if i  lt   j    x000D                          str2   str2 concat       x000D                       else  x000D                          str2   str2 concat      x000D                        x000D                    x000D                  str2   str2 concat   n   x000D                x000D   x000D              console log str2  x000D   x000D   x000D                 ---------------------- x000D   x000D   x000D                x000D                 x000D                  x000D                   x000D                    x000D                     x000D                      x000D                       x000D   x000D   x000D               -------------------------   x000D   x000D   x000D              let str3       x000D   x000D              for let i   1  i  lt  y  i      x000D                  for let j   1  j  lt  x  j     x000D                      if i  gt   j    x000D                          str3   str3 concat       x000D                        x000D                    x000D                  str3   str3 concat   n   x000D                x000D   x000D              console log str3  x000D   x000D                 ------------------------- x000D   x000D   x000D                         x000D                        x000D                       x000D                      x000D                     x000D                    x000D                   x000D                  x000D                 x000D   x000D               ---------------------------   x000D              let str4       x000D   x000D              for let i   1  i  lt  y  i      x000D                  for let j   1  j  lt  x  j     x000D                      if  j  gt   i    x000D                          str4   str4 concat       x000D                        x000D                    x000D                  str4   str4 concat   n   x000D                x000D   x000D              console log str4  x000D   x000D                 -------------------- x000D               Diamond of Asterisks x000D   x000D                     x000D                      x000D                       x000D                        x000D                         x000D                        x000D                       x000D                      x000D                     x000D   x000D   x000D               ---------------------   x000D   x000D              let str5       x000D   x000D              for let i   1  i  lt  y  i      x000D                  for let j   1  j  lt  x  j     x000D                      if i  lt   y   2  amp  amp  j  gt    y   2  -  i - 1   amp  amp  j  lt    y   2     i - 1     x000D                          str5   str5 concat       x000D                       else if i  gt   y   2 x000D                         amp  amp  j  gt    y   2  -  i     -1  x000D                         amp  amp  j  lt   y -   y   2  -  i     -1     x000D                          str5   str5 concat       x000D                        x000D                      else   x000D                          str5   str5 concat       x000D                        x000D                    x000D                  str5   str5 concat   n    x000D                x000D   x000D              console log str5  x000D   x000D   x000D

User · Answer

for var a 1 a lt 8 a            var o           for var b 1 b lt  a b               o                         debug o          Try above code   Output   -- gt    -- gt     -- gt      -- gt       -- gt        -- gt

User · Answer

You can try this   var x  y  space           star           n   4      m   n - 1  for  x   1  x  lt   n  x          for  y   m  y  gt   1  y--            space   space                    m--      for  let k   1  k  lt   x   2 - 1  k              star   star                 console log space   star      space           star

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x000D   x000D  for  let i   1  i  lt   5  i      x000D      for  let j   1  j  lt   i  j      x000D          document write       x000D        x000D      document write   lt br   gt     x000D    x000D   x000D   x000D

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x000D   x000D  for i 0 i lt  5 i    x000D    x000D      for j 0 j lt  i j    x000D        x000D          document write       x000D        x000D      document write   lt br gt    x000D    x000D   x000D   x000D

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Try this  Maybe it will work for you    lt html gt   lt head gt   lt script type  text javascript  gt      var i  j        outer loop     for i   0 i  lt  5  i             inner loop       for j   0 j  lt   i  j             document write                     document write   lt br  gt           lt  script gt   lt  head gt   lt body gt   lt  body gt   lt  html gt

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lt  DOCTYPE html gt   lt html gt       lt head gt        lt  head gt       lt body gt           lt p id  test  gt  lt  p gt       lt  body gt       lt script gt            Declare Variable         var i          for i   0  i  lt   5  i                 document write     repeat i  concat   lt br gt                    lt  script gt   lt  html gt

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the log will output to a new line every time it is called  in chrome if it s the same it will just keep a count  not sure about other browsers   You want to collect the number of stars per line then output that after the inner loop has run   x000D   x000D  for  var i   5  i  gt   1  i--    x000D       var ouput       x000D       for  var j   i  j  gt   1  j--    x000D           ouput        x000D         x000D       console log ouput   x000D     x000D   x000D   x000D

User · Answer

Just try it out    Your Pyramid will be downwards like      4 3 2 1  3 2 1   2 1    1  function stars n       var str           for var i n  i gt  1  i--           for var k n  k gt  i  k--               str      t                     for var j i  j gt  1  j--               str    j   t t                     console log str           str               stars 3     Your Pyramid will be upwards like                    function stars n       var str           for var i 1  i lt  n  i             for var k 1  k lt  n-i  k                 str      t                     for var j 1  j lt  i  j                 str       t t                     console log str           str               stars 3

User · Answer

It s very simple  Try this code as below   for var i   1  i  lt   5  i             for var j   1  j lt   i  j               document write                         document write   lt br  gt

User · Answer

Try this one for diamond pattern in javascript   lt head gt    lt style gt      p text-align center margin-left 20px     lt  style gt   lt  head gt    lt body gt      lt h1 gt JavaScript patterns lt  h1 gt      lt p id  demo  gt  lt  p gt    lt script gt    var x function n       document write   lt center gt        var c         for var i 0  i lt n  i           c c            document write c         document write   lt br gt                 for var k n k gt 0 k--         for var j 0  j lt  k-1   j            document write                    document write   lt br gt                      document getElementById  demo   innerHTML   x 10     lt  script gt

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This is the simplest solution which I came across using only one for loop   var a       var n   5  var m    n-1    for i 1  i  lt   n  i          a   a trim        a       repeat m    a    i  gt  1                        console log a       m--      Output      ------------------------                                            ---------------------------

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This below code worked for me   for i  0  i lt  n  i         col   i     for j   0  j lt  n- col j            process stdout write              for  j   1 j lt  col 2 j             process stdout write               process stdout write   n

User · Answer

function pyramid n         for i 1  i lt  n i               let str       repeat n-i           let str2       repeat i 2-1       console log str   str2   str            pyramid 5

User · Answer

lt  DOCTYPE html gt   lt html gt       lt head gt       lt script gt            Declare Variable         var i j             First Way         for i   5  i  gt   0  i--               for j   0  j  lt   i  j                     document write                                 document write   lt br gt                         Second Way         for i   5  i  gt   0  i--               document write     repeat i  concat   lt br gt                    lt  script gt       lt  head gt       lt body gt       lt  body gt   lt  html gt

User · Answer

x000D   x000D     x000D   lt html gt  x000D   x000D   lt head gt  x000D   lt script type  text javascript  gt  x000D   var i j  x000D   for i 1  i  lt   5  i    x000D     x000D    for j 1  j lt  i  j    x000D     x000D      x000D     document write       x000D      x000D     document write   lt br   gt     x000D      x000D       x000D   lt  script gt  x000D   lt  head gt  x000D   lt body gt  x000D   lt  body gt  x000D   lt  html gt  x000D   x000D   x000D

User · Answer

for  var line        line length  lt  8  line         console log line

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for var i 1  i lt  4  i        console log     repeat i          Output is

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x000D   x000D  for  var i   7  i  gt   1  i--    x000D    var str       x000D    for  var j   i  j  lt   7  j      x000D    str         x000D         x000D   console log str   x000D    x000D     This is example x000D   x000D     You can do this with any string and without using the function   x000D   x000D   x000D

User · Answer

Here is the solution in javascript while loop    gt  var i   0  out        gt   while  i  lt   4   gt         gt        out   out          gt        document write   lt br gt     out    gt        i     gt          gt     gt  document write   lt br gt

User · Answer

lt html gt   lt head gt   lt script gt        Declare Variable     var i  j        outer loop     for i   0  i  lt   25  i           inner loop     for j   0  j  lt   i  j         document write                 document write   lt br gt            lt  script gt   lt  head gt   lt body gt   lt  body gt   lt  html gt    lt  -- end snippet -- gt

User · Answer

As I understand from your code  you are actually trying to print stair pattern rather than star    Your main error consists in that console log function prints every time on the next line   for  var i   5  i  gt   1  i--        var str           for  var j   i  j  gt   1  j--  str    j      console log str       JSFiddle for you  http   jsfiddle net 99wL8cbt 2

[javascript] How to print star pattern in JavaScript in a very simple manner?

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