@priya,
We don’t have exporting chart as pdf as an inbuilt feature as of now. However with couple of lines of code you can export chart as pdf using jsPDF. Please find the code-snippet below.
var pdf = new jsPDF();
pdf.addImage(dataURL, 'JPEG', 0, 0);
pdf.save("download.pdf");
Please take a look at this JSFiddle for complete code.
___
Suyash Singh
Team CanvasJS