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Asked: 2026-05-25T02:40:19+00:00

Maybe I’m not using Math.random() correctly, although I can’t figure out what I’m doing

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Maybe I’m not using Math.random() correctly, although I can’t figure out what I’m doing wrong:

ctx.fillStyle = "rgb(Math.floor(Math.random()*256),Math.floor(Math.random()*256),Math.floor(Math.random()*256))";
ctx.fillRect(0,0,canvas.width,canvas.height);
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1 Answer

  1. Editorial Team

    fillStyle is a string. You need to use string concatenation to do what you want. Like this:

    ctx.fillStyle = "rgb("+
  Math.floor(Math.random()*256)+","+
  Math.floor(Math.random()*256)+","+
  Math.floor(Math.random()*256)+")";
ctx.fillRect(0,0,canvas.width,canvas.height);
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