Category: Calculate sum of all numbers present in a string in javascript

Calculate sum of all numbers present in a string in javascript

By using our site, you acknowledge that you have read and understand our Cookie PolicyPrivacy Policyand our Terms of Service. Stack Overflow for Teams is a private, secure spot for you and your coworkers to find and share information. Given an array [1, 2, 3, 4]how can I find the sum of its elements? In this case, the sum would be You get a TypeError console. If non-numbers are possible inputs, you may want to handle that?

We can use eval to execute a string representation of JavaScript code. Using the Array. Of course displaying an alert isn't the worst thing that could happen.

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The only reason I have included this is as an answer Ortund's question as I do not think it was clarified. In Lispthis'd be exactly the job for reduce. You'd see this kind of code:. Fortunately, in JavaScript, we also have reduce!

Calculate sum of all numbers present in a string

But we can make it pretty! Here, look:. Even better! Why not reduce? It's usually a bit counter intuitive, but using it to find a sum is pretty straightforward:. If you happen to be using Lodash you can use the sum function. This is possible by looping over all items, and adding them on each iteration to a sum -variable.

Reference: Array. This will take on average 1. Methodology note: this test was run on a Google Apps Script server, so their javascript engines are pretty much the same as Chrome.

EDIT: Holy expletive, never mind this whole post. Let's start looking into many different ways to do it as I couldn't find any comprehensive answer here:. This works for me the result should be 5.

I hope there is no hidden disadvantage in this kind of solution. I am a beginner with JavaScript and coding in general, but I found that a simple and easy way to sum the numbers in an array is like this:. Basically, I wanted to contribute this because I didn't see many solutions that don't use built-in functions, and this method is easy to write and understand.

A few people have suggested adding a. This is generally considered bad practice so I'm not suggesting that you do it.

Note that the function added to the prototype is using a mixture of ES5 and ES6 function and arrow syntax. The function is declared to allow the method to get the this context from the Array that you're operating on. No need to initial value! Because if no initial value is passed, the callback function is not invoked on the first element of the list, and the first element is instead passed as the initial value.

calculate sum of all numbers present in a string in javascript

Very c OO l feature :.By using our site, you acknowledge that you have read and understand our Cookie PolicyPrivacy Policyand our Terms of Service. Stack Overflow for Teams is a private, secure spot for you and your coworkers to find and share information. Given a string str containing alphanumeric characters, calculate sum of all numbers present in the string. The first line of input contains an integer T denoting the number of test cases.

Then T test cases follow. Each test case contains a string containing alphanumeric characters. This code is working fine. I would loop backwards over the string. No nested loops. Just take the 10s exponent as you move left. Other solutions include using regex to split the string on all non digit characters, then loop and sum all numbers.

You will have to change the logic in your while loop as well if you wish to change that in your for loop condition because it's quite possible number exists at the end of the string as well, like in one of your inputs 1abc2x30yz So, correct code would look like:. Other answers have pointed out the correct loop conditions to ensure proper operation of your program. If you are allowed to use library functions other than isdigitI would recommend using strtol with the EndPtr parameter output parameter that points to the character in the string that caused strtol to stop scanning a number :.

Learn more. Asked 8 months ago. Active 8 months ago. Viewed times. I am solving this problem: Given a string str containing alphanumeric characters, calculate sum of all numbers present in the string. Input: The first line of input contains an integer T denoting the number of test cases. Output: Print the sum of all numbers present in the string. Laveena Laveena 69 8 8 bronze badges. Why are you using a while loop and manually increasing the loop counter inside of a for loop?Given a string str containing alphanumeric characters, calculate sum of all numbers present in the string.

Input: The first line of input contains an integer T denoting the number of test cases. Then T test cases follow. Each test case contains a string containing alphanumeric characters. Output: Print the sum of all numbers present in the string.

Example: Input: 4 1abc23 geeks4geeks 1abc2x30yz67 abc. Output: 24 4 Explanation: Testcase 1: 1 and 23 are numbers in the string which is added to get the sum as Testcase 4: is a single number, so sum is We strongly recommend solving this problem on your own before viewing its editorial. Do you still want to view the editorial? Please choose 'ReadOnlyMode' if you needn't to 'Edit' the problem e. Problems Courses Get Hired.

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Write a java program to find Sum of Digits in a String.

Back To Explore Page. Basic Accuracy: Company Tags. Topic Tags. Load Comments. Login to report an issue on this page. Editorial We strongly recommend solving this problem on your own before viewing its editorial. All Submissions My Submissions: Login to access your submissions. EditMode ReadOnlyMode. Attach Screenshot optional. Send Close.Given a string containing alphanumeric characters, calculate sum of all numbers present in the string.

The only tricky part in this question is that multiple consecutive digits are considered as one number. The idea is very simple.

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We scan each character of the input string and if a number is formed by consecutive characters of the string, we increment the result by that amount. This article is contributed by Aditya Goel. If you like GeeksforGeeks and would like to contribute, you can also write an article using contribute. See your article appearing on the GeeksforGeeks main page and help other Geeks.

Please write comments if you find anything incorrect, or you want to share more information about the topic discussed above. Attention reader! Writing code in comment? Please use ide. Python3 program to calculate sum of.

Function to calculate sum of all. A temporary str1ing. IsDigit ch. Parse temp. WriteLine findSum str. Regular Expression that matches digits in between a string. This code is contributed. Load Comments.

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We use cookies to ensure you have the best browsing experience on our website.By using our site, you acknowledge that you have read and understand our Cookie PolicyPrivacy Policyand our Terms of Service. Stack Overflow for Teams is a private, secure spot for you and your coworkers to find and share information. How do I calculate the sum of all the numbers in a string? My attempt is below. Also could I calculate the sum of only those numbers which are divisible by 2? Parsing chars back to String and then to Integer is too expensive, since you already have a char.

You should try doing this:. Here's a full mainline example you can run. This should answer your question and all the follow on questions in the comments. Learn more. How to calculate sum of all numbers in a string Ask Question. Asked 6 years, 7 months ago. Active 3 months ago.

calculate sum of all numbers present in a string in javascript

Viewed 72k times. Daniel 2, 11 11 silver badges 31 31 bronze badges. What is the problem with your code? Generally this code look fine to me. Except that you missed the case that num is not empty after you finished loop.

You need to check it for emptiness after the loop and add it to sum if it's not empty. If i want to calculate sum of only those number which are divisible by 2 than what can i do. Active Oldest Votes. Cool answer, but what about the even number requirement.

Kundan Shinde Kundan Shinde 31 1 1 bronze badge. Some thing like this. VinayVeluri VinayVeluri 5, 4 4 gold badges 28 28 silver badges 51 51 bronze badges.The service allows shoppers to order goods online then pick them up in store.

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calculate sum of all numbers present in a string in javascript

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calculate sum of all numbers present in a string in javascript

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