JavaScript String Operators

The + operator can also be used to add (concatenate) strings. When used on strings, the + operator is called the concatenation operator.

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<body> <h1>Using + Operator</h1> <p>The operator + concatenates (adds) strings.</p> <p id="demo"></p> <script> txt1 = "John"; txt2 = "Doe"; txt3 = txt1 + " " + txt2; document.getElementById("demo").innerHTML = txt3; </script> </body>	Using + Operator The operator + concatenates (adds) strings.

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Displayed by browser:

<body>
<h1>Using + Operator</h1>
<p>The operator + concatenates (adds) strings.</p>
<p id="demo"></p>
<script>
txt1 = "John";
txt2 = "Doe";
txt3 = txt1 + " " + txt2;
document.getElementById("demo").innerHTML = txt3;
</script>
</body>

Using + Operator

The operator + concatenates (adds) strings.

The += assignment operator can also be used to add (concatenate) strings:

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<body> <h1>Using += Assignment Operator</h1> <p>The assignment operator += can concatenate strings as well.</p> <p id="string"></p> <script> txt4 = "What a very "; txt4 += "nice day"; document.getElementById("string").innerHTML = txt4; </script> </body>	Using += Assignment Operator The assignment operator += can concatenate strings as well.

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Displayed by browser:

<body>
<h1>Using += Assignment Operator</h1>
<p>The assignment operator += can concatenate strings as well.</p>
<p id="string"></p>
<script>
txt4 = "What a very ";
txt4 += "nice day";
document.getElementById("string").innerHTML = txt4;
</script>
</body>

Using += Assignment Operator

The assignment operator += can concatenate strings as well.