In Angular, there are several ways to convert a string to a number. Here are a few options:
- Using the
Number
constructor:
let num = new Number('123');
- Using the
parseInt
function:
let num = parseInt('123');
- Using the
parseFloat
function:
let num = parseFloat('123.45');
- Using the
+
operator:
let num = +'123';
It’s important to note that these methods will only work if the string represents a valid number. If the string is not a valid number, you will get NaN
(Not a Number) as the result.
You can check if the result is NaN
using the isNaN
function:
if (isNaN(num)) {
// num is not a number
}
You can also use the Number
function to handle the conversion and check for NaN
at the same time:
let num = Number('123');
if (isNaN(num)) {
// num is not a number
}
It’s also worth noting that the parseInt
and parseFloat
functions have an optional radix parameter that specifies the base of the number in the string. For example, if the string is a hexadecimal number, you can use parseInt
with a radix of 16:
let num = parseInt('FF', 16); // num is 255
I hope this helps! Let me know if you have any questions.

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