The toString() function in Javascript is used with a number and converts the number to a string. It is used to return a string representing the specified number object.
Syntax:
num.toString(base)
The toString() function is used with a number num as shown in above syntax using the ‘.’ operator. This function will convert num to a string.
Parameters Used: This function accepts a single optional parameter base. This parameter specifies the base in which the integer is represented in string. It is an integer between 2 and 36 which is used to specify the base for representing numeric values.
Return Value: The num.toString() method returns a string representing the specified number object.
Below are some examples to illustrate the working of toString() function in JavaScript:
-
Converting a number to a string with base 2: To convert a number to a string with base 2 , we will have to call the toString() method by passing 2 as a parameter.
<
script
type
=
"text/javascript"
>
var num=213;
document.write("Output : " + num.toString(2));
</
script
>
Output:
Output:11010101
-
Converting a number to a string with base 8: To convert a number to a string with base 8, we will have to call the toString() method by passing 8 as a parameter.
<
script
type
=
"text/javascript"
>
var num=213;
document.write("Output : " + num.toString(8));
</
script
>
Output:
Output : 325
-
Converting a number to a string with base 16: To convert a number to a string with base 16, we will have to call the toString() method by passing 16 as a parameter.
<
script
type
=
"text/javascript"
>
var num=213;
document.write("Output : " + num.toString(16));
</
script
>
Output:
Output : d5
-
When no parameter is passed: If the toString() method is called without passing any parameter then the number will be converted to string without change in BASE. Below is the program to illustrate this:
<
script
type
=
"text/javascript"
>
var num=213;
document.write("Output : " + num.toString());
</
script
>
Output:
Output :213
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