how to add a line in excel code example

Example 1: how to print a line in javascript

console.log("Your line would be here")//Prints a line on the console 
alert("Your message here")//Raises an alert

Example 2: add vertical line in plot python

pythonCopymatplotlib.pyplot.axvline(x=0, ymin=0, ymax=1, hold=None, **kwargs)