String Operators

JavaScript’s string operators are used to attach strings to one another, or to attach variables to strings.
String operators each have a symbol known as the operator that is used to perform the operation

1. Concatenation : concatenate is another word for add. Concatenating two strings simply means adding or attaching them to one another.

Operator: +
Examples: x = "My name is "; y = "Hulk Hogan, "; z = "Brothur"; var sentence = x + y + z;
Q : What is the value of the variable sentence? —
Note that this operator (+) is also used for numerical addition.
You may ask how you are supposed to specify that you are adding strings instead of numbers, and the answer is that you do not have to.
If any value you are adding is a string, the compiler automatically uses the + operator to concatenate values to the string, even if they are numbers. The result is a string. For example: var cents = 93; var sentenceWithNumbers = "I have " + 16 + " dollars and " + cents + " cents."; console.log(sentenceWithNumbers);
The result of this code in the console would be:

Image description

Note that between each value or variable added, another addition sign needs to be used to concatenate the entire string. —
It is good practice to pay attention to where spaces should be inserted so that the sentence’s formatting is not confusing and bunched together when the string is printed out.
Typically if you are printing a string and then a new variable or string, you want to make sure there is a space included at the end of the first string, or the beginning of the second.
If a numeric value is printed before another or before a string, you can concatenate a single space before the next number, or include a space in the beginning of the next string

2. Concatenate-Equals : assigning a variable to its original value plus some specified value concatenated to it
Operator: +=

Examples:

x = "My name is ";
y = "Hulk Hogan,";
z = "Brothur";
var sentence = x + y + z;
x += y + z;

See the Pen Exercise 2.3 by LSU DDEM (@lsuddem) on CodePen.