// Example
var ourStr = "I come first. " + "I come second.";
// Only change code below this line
var myStr = 'This is the start.' + 'This is the end.' ;
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Build myStr from the strings "This is the start. " and “This is the end.” using the + operator.
Note the space. Also because you want the output to be “This is the start. This is the end.”. If you don’t use that extra space, you end up with: “This is the start.This is the end.”.
If it helps you clarify the mechanics of interpolation, the expression with an extra space is like writing this: myStr = "This is the start." + " " + "This is the end.";. No, it doesn’t help either, I think