In computer science, a forloop (or simply for loop) is a control flow statement for specifying iteration, which allows code to be executed repeatedly. Various keywords are used to specify this statement: descendants of ALGOL use "for", while descendants of Fortran use "do". There are other possibilities, for example COBOL which uses "PERFORM VARYING".
A forloop has two parts: a header specifying the iteration, and a body which is executed once per iteration. The header often declares an explicit loop counter or loop variable, which allows the body to know which iteration is being executed. Forloops are typically used when the number of iterations is known before entering the loop. Forloops can be thought of as shorthands for whileloops which increment and test a loop variable.
The name forloop comes from the word for, which is used as the keyword in many programming languages to introduce a forloop. The term in English dates to ALGOL 58 and was popularized in the influential later ALGOL 60; it is the direct translation of the earlier German für, used in Superplan (1949–1951) by Heinz Rutishauser, who also was involved in defining ALGOL 58 and ALGOL 60. The loop body is executed "for" the given values of the loop variable, though this is more explicit in the ALGOL version of the statement, in which a list of possible values and/or increments can be specified.
In FORTRAN and PL/I, the keyword DO is used for the same thing and it is called a doloop; this is different from a dowhile loop.
str1="hello"
for stringElement in str1:
print("str1","=",stringElement)
Strings are arrays in python and they are represented like this.
Now I want to understand how the for loop is working here.
My dry run:
for h in str1
print h
for e in str1
print e
and so on till...
I'm in an intro E&M class, and I'm trying to distinguish between Motional EMF for loops of wire and conducting plates. This question might be kind of silly, but are Eddy currents pretty much the same thing as induced currents in a loop of wire? More specifically, what I am trying to ask is if...
Hi all,
I have the code below with a 'for' loop. I see the output is 17, the sum of all elements of the (variable?)
result. I am a bit confused: I cannot tell which part of the code is used to determine that the values
{1,2,10,4,5} must be added to each other?
Please comment/correct:
1)We define...
Hi, I need some helps. I try to run the code below but its keep give me the value of intial value.
Q = 1415; \[Mu] = 1000; \[Sigma] = 500;
double dx;
double x;
double fx;
double fxplusdx;
double I1;
double I2;
I1 = 0;
I2 = 0;
For[x = 0, x <= Q  dx, dx += 0.01,
fx = PDF[NormalDistribution[0...
I've come across a rumor that states that ifelse statements can make the loops go slower. Well, it's not rumors since the writer offered numbers (times) to support the statement.
http://blogs.sas.com/content/iml/2012/02/13/avoidunnecessaryifthenstatementsinloops.html
I was wondering...
Hello, well I am not sure how to search for this online, but I raise this question here:
Suppose that I have several bins of let's say cuts, here I list 3 but the main idea is to make their numbers tunable by the user:
cut1 = { "p10" : "p <= 10" ,
"11p20 " : "10<p && p<=20" ...
In C++ we have 2 types of data structures :
1)simple data structure
so array and structure come in simple data structure group
2)compound data structure
so stack,queue,link list,tree come in compound data structure group.
In Indian board CBSE data structure linked list is not included it is...
I WANT TO ASK YOU THAT I HAVE LEARNED SCRATCH AS I AM KID OF 17 AND BEGINNER IN PROGRAMMING.
I LEARN SCRATCH TO DESIGN BEFORE BUILDING,SOLVE PROBLEMS CREATIVELY.
NEXT I AM LEARNING C++ AND FINDING DIFFICULTY WRITING PROGRAMS LIKE ARMSTRONG NUMBER SO I SHOULD LEARN PYTHON BEFORE C++ .
I AKSED I...
Aloha guys,
I am just having trouble getting MatLab to output only the last variable of my "for loop."
If anyone can help all I am looking for is an example of notation.
p.s. I have done this before just not in a while and will continue to look through my old scripts and functions. just not in...
I'm wanting to take user input and store it into an array.There is a a minimum and maximum number of input but otherwise the user should be able to enter any number of integers in between. Say the max number is 10 but I only want to enter 5 numbers. I used a for loop but it only ends if the...
Hello! :) I am having a hard time with understanding the logic behind decrementing nested for loops. The review problem I'm dealing with is below. This one makes the numbers go backwards.
#include <iostream>
using namespace std;
int main(){
for (int i = 0; i < 5; i++){
for (int j = i; j >=...
Homework Statement
Homework Equations

The Attempt at a Solution
I've been trying several different ways but I just can't seem to figure this one out. It seems to me like I will need nested for loops, which we haven't learned yet. The way I read the question is that this program needs to...
I am working with Quick Basic, 64 Bit for Windows, which is quite good indeed, but i met again the same usual difficulties to use [do ... loop] for efficient loops.
So I decided to better use [goto], as anyone else!
But I also found very useful the classical for loop.
Here are some useful...
Given the following system of equations
3x1 + ax2 = 1
ax1 + 4x2 = 0
where pi ≤ a ≤ pi. We would like to find out the range of values of x1 and x2 that are observed as a is varied. Do this as follows:
1. Create a for loop that uses the variable a as the indexing value, varied from over...
The Problem: Write a function that finds the factorial of a positive integer without using for or while loops, the factorial function, or the : range operator.
Honestly, I don't really know how to start with this one. If I were able to use a for loop it would be easy, and I don't see how I...
I want to generate a Poisson distributed vector of random numbers, without any of the numbers being 0. The code I have is
k = poissrnd(kmean,1,N);
% where kmean is the mean of the distribution, and has been defined previously
%The above generates a N by 1 vector of Poisson distributed...
Matlab "solve" function in "for" loops
I need to solve a similar problem like shown in the below codes for a larger matrix,
The 'x' here needs to be solved for each y(a,b). Each of this y(a,b) is equal to zero and 'x' will vary accordingly , so it will give a 2by 2 matrix for 'x' as well...
Hi
I'm using the fsolve method to solve for 3 variables in 3 nonlinear equations.
I would like to find out, how the 3 variables change, when I change a parameter in the 3 equations. Let's assume the parameter runs from 1 to 5 (1:1:5).
The iteration looks like this:
c=(1:5);
for i = 1:5...
MatLab "for" loops
Homework Statement
Write an mfile to evaluate y(x)= x^2  3x +2 for all values of x between 1 and 3, in steps of .1 . Do this twice, once with a for loop and once with vectors. Plot the resulting functions.
Homework Equations
The Attempt at a Solution...
"for" loops problem
Homework Statement
I would like Mathcad 2001i to calculate a trajectory for me.
The idea is to take initiating x,y coordinates and x,y velocity, calculate the x,y acceleration at that point and then calculate where it will be after 1 t, then calculate the new acceleration...
Hello!
I consider myself typically a confident Matlab user. But I have encountered a new problem that I have no idea how to solve, so I'm hoping I can find some help.
I have set up a for loop in my code to the effect of
for i = 1:n
if MyArray(i,1) < some value
perform other...
Homework Statement
Can someone help me set up a "for loop" for this equation
I intialize hc = x0 then I have to compute
hc1 = C.*(log(hc./b)+1)+ gamma.*(1exp(hc./gamma))
hc2 = C.*(log(hc1./b)+1)+ gamma.*(1exp(hc1./gamma))
hc3 = C.*(log(hc2./b)+1)+ gamma.*(1exp(hc2./gamma))
hc4...
matlab matrix selection of data using for loops and if statements,,,,,
Hi people I was wondering if someone could assist me with the following;
You received the following data values from a coworker:
data = [1.2, 3.3, 5.1, 0.2, 2.9, 0.1];
It turns out that the sensor used to collect...
I need some help. So far I have some for loops that print the following patters:
*
**
***
****
*****
******
*******
********
*********
**********
and **********
*********
********
*******
******
*****
****
***
**
*
Here is the code:
for(int rows=1;rows<=10;rows++)
{
for(int...