Changing types of data
To avoid unpredictable behaviour, you can force a variable n to be a number by using the assignment n *= 1 and to be a string by using the assignment n += "". Another option is to use the function typeof (discussed in the earlier section on types of data) to determine the type of a value and then make sure you deal with it appropriately.
We have already seen the function Boolean(); here we present it again with other functions that change types.
| Function | Type produced |
|---|---|
Number() |
number |
String() |
string |
Boolean() |
Boolean |
Note:
Hints:
- undefined
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1
2
console.log("Using Number");
console.log(Number(5));
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