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String to number conversion is necessary for many scenarios. In this blog post, we’ll explore how to to convert typescript convert string to number. Topics covered include typecasting, the as operator, and the parseInt() function.
Typecasting
Typecasting is when you temporarily treat a variable as if it were another data type. In TypeScript, there are two ways to do typecasting. The first way is with angle brackets (<>). For instance, if there is a variable mynum that is set to the string “5”, you can typecast it to a number with mynum. This would allow you to perform mathematical operations on mynum as if it were an actual number, even though it still technically is a string. The second way to do typecasting is with the “as” operator. For instance, you could typecast mynum to a number with mynum = mynum as a number. Both of these methods achieve the same outcome; it’s just a matter of personal preference which one you use.
The as operator
The as the operator is used for type casting in TypeScript. It tells the compiler that we want the specified variable to be treated as if it were of the specified data type, even if it isn’t actually that data type. This can be useful in situations where you want to take advantage of the benefits of multiple data types. For instance, let us presume you have a variable myvar that is set to the string “5”. You can utilize the as operator to tell the compiler that myvar should be treated as a number when performing mathematical operations on it, even though it technically is still a string. To achieve this, you would write myvar = myvar as a number. After doing this, you would be able to perform mathematical operations on myvar without any problems. It’s important to note that the as operator only works when you’re trying to cast a variable to a data type that it can actually be changed to.
parseInt() function
The parseInt() function is used for converting strings into numbers. This function uses two arguments; the first variable is the string that you want to convert into a number, and the second variable is the radix (the base of the number in question). The radix can be any integer between 2 and 36; if no radix is specified, then 10 is used by default. For instance, if there is a variable mystr that is set to the string “5”, you can utilize parseInt() to convert mystr into a number like so: parseInt(mystr). This would give you the integer 5; if you wanted to convert mystr into a floating point numeral (a decimal), then you would use parseInt() like so: parseInt(mystr)/10. This would give you the floating point numeral 0.5.
Conclusion
In this blog post, we explored how to convert strings into numbers in TypeScript. We looked at three different methods: typecasting, using the as an operator, and using the parseInt() function. Each of these methods has its own advantages and disadvantages; it’s up to you to decide which one best suits your needs. Thanks for reading!