如何在JavaScript中打印半金字塔

Question

The code works but I don't want the inner for loop to take me to the new line.

 for (i = 0; i < 5; i++) { for (j = 1; j <= i; j++) { console.log('*'); } console.log(); } console.log('-----------------'); 

Answer 1

console.log will automatically break the line. Concatenate to a string instead of a log. Log at the end.

 let str = ''; for(i = 0; i <= 5 ; i++) { for(j = 1; j <= i; j++) { str += '*'; } str += '\\n'; } console.log(str); 

Answer 2

You can do this way, with the help of a string variable:

 for (i = 0; i < 5; i++) { var str = ''; for (j = 1; j <= i; j++) { str+='*'; } console.log(str); } console.log('-----------------'); 

Answer 3

You need to break the line with the console.log you can also controle the space between * with output+='*' + " ";

 function pyramid() { var total = 5; var output=""; for (var i = 1; i <= total; i++) { for (var j = 1; j <= i; j++) { output+='*' + " "; } console.log(output); output=""; } } pyramid() 

Answer 4

If you want to print at the page, use like below

   for (i = 0; i < 5; i++) {
      let j=0;
      do{document.write("*");j++;}while(j < i)
      document.write("<br/>")
    }

Answer 5

You can get rid of second for loop as follows:

  var str = ''; for (i = 1; i <= 5; i++) { str +=Array(i).join("*"); str +='\\n'; } console.log(str); 

Answer 6

最短的代码：

 console.log('*\\n**\\n***\\n****\\n*****');