String function
The String function converts
a passed value to a string. Conversions
for primitives (numbers, strings, and
other simple types) are done in the
most obvious way. For example: true
- 'true', 5 - '5'. And
objects are most often converted to
'[object Object]', but there
may be exceptions.
Syntax
String(what to convert);
Example
Let's convert the number
0 to a string:
String(0);
The code execution result:
'0'
Example
And now let's set the non-numeric
NaN value as the function
parameter:
String(NaN);
As a result, we will get the string:
'NaN'
Example
Let's convert the boolean
false value:
String(false);
The code execution result:
'false'
Example
Let's convert a string using
the String function:
String('str');
After executing the code, we will get the same string:
'str'
Example
Now let's set the function
parameter to null:
String(null);
As a result of executing the code, we will get a value converted to the string:
'null'
Example
Let's set the function parameter
to undefined:
String(undefined);
The code execution result:
'undefined'
Example
Now let's enter curly braces in the parameter as a designation of an empty object:
String({});
After executing the code, we will get the string that will specify the type of the given object:
'[object Object]'
Example
And now we convert square brackets or an empty array:
String([]);
As a result, instead of specifying the object type, we get an empty string:
''
Example
Let's add an array filled with numbers to the function parameter:
String([1, 2, 3]);
As a result of code execution, all array values are converted into one string:
'1,2,3'
