"FOR" loop
20 次查看(过去 30 天)
显示 更早的评论
I have to find the prime numbers from that lead up to 100 and then use the 'for' function to multiply adjecent prime numbers: example:
first prime numbers
2 3 5 7
and i need the 'for' to do the following with the prime numbers
2*3 3*5 5*7 etc...HELP PLEASE
1 个评论
Dinesh Kannan Natarajan
2021-4-28
% to Generate prime number between the intervals
clear;
clc;
m=input('provide the required start point of prime number: ');
n=input('provide the required end point of prime number: ');
if n<=0
pr='Error';
disp('ERROR: Input argument must be a positive integer')
elseif round(n)~=n||round(m)~=m
pr='Error';
disp('ERROR: Input argument must be positive integer')
elseif n <= m
pr='Error';
disp('ERROR: end point must be greater than start point')
else
k=1;
for i=m:n
c=0;
for j=2:i-1
if rem(i,j)==0
c=1;
break
end
end
if c==0
pr(k)=i;
k=k+1;
end
end
end
pr
回答(4 个)
Junaid
2011-12-4
let say your prime vector is P;
p=primes(100);
a = zeros(1,length(p)-1);
for i=1:length(p)-1
a(i) = p(i) * p(i+1);
end
a
though you can do it also without loop but you asked for a loop so it is loop solution.
Junaid
2011-12-4
p=primes(100);
A = zeros(1,length(p)-1);
for i=1:length(p)-1
A(i) = p(i) * p(i+1);
end
A
just copy and paste the code, answers is in vector (A) try this, do let us know if it is what you wanted to do.
Sean de Wolski
2011-12-6
Loop sure seems like overkill
x = primes(100);
x1p1 = x(1:end-1).*x(2:end);
0 个评论
Andrei Bobrov
2011-12-4
a = 1:100;
yourprime = a(a - sum(rem(triu(bsxfun(@rdivide,a,a.')),1)>0)<=2);
out = prod(yourprime(bsxfun(@plus,1:numel(yourprime)-1,(0:1)')))
1 个评论
另请参阅
类别
在 Help Center 和 File Exchange 中查找有关 Loops and Conditional Statements 的更多信息
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!