Most voted "for" questions
Use this tag when the question primarily involves logic and/or command structure. Effectively, the for is a loop of repetition used to iterate matrices, vectors, or to another end that basically has three components: start, stop condition, and step, where it is usually possible to omit some of these components (although not very recommended).
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viewsLoop is not walking, does not leave the first position
f3 <- function(n) { dados <- rnorm(n, mean = 0, sd = 1) matrizB <- matrix(0,2, n) for (i in 1:length(dados)) { s <- 1 if (i <= 0.2) { matrizB[1,] <- 1 matrizB[2,] <- 0.2 } if (i…
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answer23
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answer1122
views"String index out of range: 5"
There is an error mentioned in the question in my java program. The program is a barcode reader. The user informs the digits of the code (except the last one). The sum of the numbers q are in odd…
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answer101
viewsProblem with array loop - Javascript
When I try to run the loop, even if I want to enter the is, I already checked and the array with the object is not empty, but does not execute the loop... Any idea? var caminho = [];…
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answers1446
viewsHow to pick up array index?
I have the following APEX code List<integer> entrada = new List<integer>(); public static void generateStringArray(integer entrada){ List<String> ListaPrincipal = new…
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answer103
viewsHow to add values from a for structure?
So, I need to solve a little problem in my code (I’m very newb), I’m just programming because I need it for my TCC, I don’t know much python but I’m trying to turn around. On line 126 there’s that…
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answer712
viewsFunction passing
Run a function called passWhy you print on the console "here I have the value of x" where x will be the value of i in each iteration, for each value from 0 to 3. Only it gives this error message:…
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answers110
viewsUsing the for command in Javascript
People, can you help me ? I am trying to get a function to be executed and to return the word "Blue" 4 times, through a Cycle. I tried to write this here, but it gave the following error…
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answer34
viewsRemoving higher value from line with for
Good afternoon, I’m trying to extract the largest whole value from every line of my dataframe. I created the following code for this: for i in df.index: df["maxx"] = df.loc[i].max() df["minn"] =…
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answer811
viewsHow to make loops in R
I’m working on climate data and I need to do a boundary analysis for every element of my database. I need to make loops because my database is too big, but I don’t know where to start. One part of…
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answer186
viewsStatement for 2 arguments, how does it work?
I saw this statement in a code on codewars and I couldn’t understand how it works: def multiple_of_index(arr): return [val for index, val in enumerate(arr) if index and val % index == 0]…
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answers204
viewsIs there any way to nest one for N times?
In Python is there any way to nest one for inside the other N times? Or is there some kind of algorithm that simulates this? Basically I need to create a function, which performs combinations of…
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answer46
viewsIs it possible to create dictionaries using surreptitious ties?
I was wondering if I could create a dictionary using loops. But I don’t want to create a dictionary within a list [{ }]. example: from random import randint jog = dict() for n in range(1, 5):…
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answer39
viewsCalculate the product within a for loop
I need to calculate the product of 3 numbers inside a loop for, but the code I made is going wrong, multiplying something bizarre that I couldn’t even understand, for example, if I input 1, 1, 1, it…
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answer31
viewsStop Loop For when a certain number is typed
I’m trying to stop a loop for when the number 42 is typed. Even my code is like this: var numero = prompt('Digite o numero') var arrNumero = [] arrNumero.push(numero) console.log(arrNumero) for (let…
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answers84
viewsHow do I create a time interval in the execution of a for?
How I create a 1 second interval in the execution of the for or of function? JavaScript: function Linha1() { for (var i1 = 0; i1 <= 3; i1++, Linha1.setInterval(1000)) { if (notas1[0][i1] == 1) {…
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answer59
viewsCan you improve my code?
Hi, I’m Vitor, and I’m new to programming and Stack Overflow, and I’d like some tips on how to clean my code. ->Code to read 50 integers between 0 and 9 and count how many times each number was…
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answer88
viewsProblem checking for an array
I was doing a very simple old game, and the same done, I wanted to leave the automatic win check, because it was very "hard-code". The way I found to do this was by running a for, and whenever it…
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answer54
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answer25
viewsdisplay array result within phpmailer message
Good evening folks, I need to display the results of an array in a message body phpmailer, so send the same by email. My sending code is working and I have done several tests, the email arrives…
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answer32
viewsArray javascript - know number of agencies I have
I needed to know how many agencies I have in my json file and their respective numbers, in case I know they are 4, but the return being given is an array of 120 accounts only, and I would like an…
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answers70
viewsPython - Checking items in a list
I have a scenario, a little confused to explain... but I’ll try... I need to compare listA with listaB, where case 1 or more items from listaA are within the listaB, I print it on the screen, but in…
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answer19
viewsHow to Browse a List With Map and Array List Within the Same List (JAVA)Springboot
I need to go through this List (List) however I cannot, I need to pass the value "options",take the value "option_Id", and go through the option_value and bring the option_value_id and Name in…
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answers82
viewsfill as data an Array up to a specific value
I need to make a program that reads the keyboard names until the user type the word "order", and then print the typed names in the order they were typed. So far, I’ve tried to resolve this issue…
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answer286
viewsHow to increment and decrease using FOR?
I’m not getting to increment the variable with each click on one button. Example: a Button and a Paragraph, every click on button, increase the value in Paragraph, example, from 0 to 1, and each…
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answer121
viewsREPEAT NUMBERS EVERY 4 TIMES IN PHP
Hello, sorry for the ignorance is that I am now entering the back-end and I need a 'for' that repeats the same number of 4 in 4, at each repetition it increments, receives one more FOR EXAMPLE: MUST…
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answers85
viewsI am learning Python and have an exercise using the FOR that I am not able to do, can anyone help me?
Build an algorithm that reads the age and sex of 5 people, providing: *The number of men and women; *The average age of men and women; *The greatest age among men; *The lowest age among women. This…
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answers126
viewsHow to operate on the counter of a while in each loop iteration
Sorry my ignorance I’m starting to learn python now, my doubt is: How can I generate a result in each iteration of a while. valor= input('digite o numero desejado:') contador = 0 while contador…
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answer68
viewsWhy does my function only return "even"?
function parimp(n){ for(var i = 0; i <= n; i++){ if(i % 2 == 0){ return "par"; }else{ return "impar"; } } } var s =…
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answers64
viewsBug when adding elements to the list and transforming it into a string
I’m trying to headache in the course of a mini-project to develop a hangman game, in the function that would return the string containing the hidden word, showing only the guessed letters. I’ve…
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answer31
viewsHow to always take the next 2 elements of a string
I have the following string: gxAjaxKey = "FF00FFFFFFFF2426FFFFFF046448FF70" I must take 2 elements at a time from this string and convert to byte: FF = 255 00 = 0 FF = 255 . . . 70 = 112 I wrote the…
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answer40
viewsHow do I put a close button on my python file?
I’m starting in python and I’m writing a code, but when all the actions end the program closes, how do I put a command where for example click ESC and it closes? I want that when the person does not…
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answer26
viewsHow to consist of a data frame against a valid value array?
I have an array of all possible values that appear in a set of columns of a data frame. The number of components in the vector is different from the number of observations of the data frame. My goal…
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answer107
viewsC number of approved students failed
Please, I need the total amount of failed and substitute students approved program Elaborate program C to calculate and display the average of 3 students in a given discipline. The simple arithmetic…
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answer62
viewsProblem with switch case inside for loop
I need help with my code with switch case inside for loop. I’m a beginner in programming and I don’t understand why the loop doesn’t run as desired. The desired would be to run the printfs before…
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answers63
viewsInfinity C loop array
In this example below, how do I print on the screen all values assigned to n during the loop, after its completion? #include <stdio.h> #include <conio.h> int main (void) { int n; for…
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answers3074
viewsHow to calculate numbers in a given range?
How could I compute the sum of the numbers in a range of 1 to 500 in which the summed numbers of that range should be odd and multiple of three? I only managed to take the break so far: for c in…
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answers259
viewsGet the position in a for loop in java?
My java code: for (Construtor usuario: users){ Construtor USER = new Construtor(user.getNomeUsuario); arrayList.add(USER); } ** How do I get the position of the loop in this configuration above? See…
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answer136
viewsGo inside another For
Guys I’m needing to run a for inside another for but I’m not getting it. I need to store the result value within a variable. I’m not familiar with python, I believe this is the biggest problem.…
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answer178
viewsWith creating a program that reads 10 numbers and writes the lowest and highest read value (Python)?
I’m having a little trouble with this exercise. Here is my code: python num = float(input('Digite o 1 numero: ')) guarda_maior = num guarda_menor = num for n in range(1, 10): num =…
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answers49
views(python) as I put the go inside def
numero_sorte = 3 n_tentativas = 4 for rodada in range(1,n_tentativas): tentativa_2 = input ('qual o numero secreto? ') tentativa_2= int (tentativa_2) def jogo_adivinha(chute): if numero_sorte ==…
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answer35
viewsHow do I make a series of numbers (3-in-3). Using for x in range?
How I make a series of numbers (3-in-3). Using for x in range ?
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answers68
viewsJavascript function using For
I have an array with the height of several students and need to sort in groups by height. I do a for to scan the array and inside the for a conditional if to know if the student enters that group,…
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answer69
viewsIs there a way back to a particular line of code?
I would like to know if there is any module, function, etc. that would allow me to go back to a certain line of code. I have this doubt because, whenever I want to ask a question repeatedly, I have…
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answer32
viewsCreate a program that reads a number between 2 and 20 and generate a screen with the configuration shown below:
the program must display the following result: Type a random number between 2 and 20: 7 Exit from the program: 1234567 x123456 xx12345 xxx1235 xxxx123 xxxxx12 xxxxxx1 (NOTE: the value typed by the…
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answers80
viewsHow do I check which items in List2 are in List1, then their count and order
I am a beginner in Python and I would like to count on your help for the problems below. I have worked on two lists as the following objectives: 1.Check which items in List2 are in List1 2.Count…