How To Print A Triangle In Java Using For Loop


hello guys , i remember what kind of homeworks in java students get at the start so i started to post solutions in this even i had to do this when i was doing java (a diploma) our sir asked us to make a program that prints out a triangle using For Loops so i created my own answer but my sir showed us a different one it doesn't even looks like a triangle but it has the triangle shape but mine is exactly a triangle .

this is my answer , NOTE : the easiest and the best way to print a real triangle





preview :

How To Print A Triangle In Java Using For Loop

this what our sir showed us



preview :

How To Print A Triangle In Java Using For Loop

so what do you choose as triangle ?

77 comments

print the triangle using only two loops, and yes also don't use recursion concept! have a happy coding!

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Anonymous mod

I love my iPad. iPad Air has iOS 7. Overall , my iPad is awesome and it is flawless to me.
Your lesson for printing the triangles are the same way for my iPad's remarks.

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Can You Help Me With This Output?
1
121
12321

Reply

that is not nested loop bro. for 123456789 try this :

public class Test
{
public static void main(String [] args)
{
for (int i=1; i<=9; i++)
{
System.out.println();
for (int j=1; j<=i; j++)
{
System.out.print(j);
}
}
System.out.println();
}
}

I am sorry, I am not doing programming anymore so I don't know how else I could help you :)

Reply

Thank you very much
It really helped :)

Reply

can u help to print * diamond shape in java using for loop

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class Diamond {
public static void main(String[] args) {
for (int i = 1; i < 10; i += 2) {
for (int j = 0; j < 9 - i / 2; j++)
System.out.print(" ");

for (int j = 0; j < i; j++)
System.out.print("*");

System.out.print("\n");
}

for (int i = 7; i > 0; i -= 2) {
for (int j = 0; j < 9 - i / 2; j++)
System.out.print(" ");

for (int j = 0; j < i; j++)
System.out.print("*");

System.out.print("\n");
}
}
}
/*
*
***
*****
*******
*********
*******
*****
***
*
*/

source : *http://www.java2s.com/Tutorial/Java/0080__Statement-Control/PrintoutaDiamond.htm

Reply

hi there do have java code for printing do java in pattern like

D D
D D
D D
D D
like this total DO JAVA

Reply

not like that is mush be like

D\\D
D\\\\\\D
D\\\\\D
D\\\D
D
\ is space

Reply

how to make 'A' out of stars(*)

Reply

please some one help me I also need it

Reply

how to get this psttern

555555
4444
333
22
1

Reply

how to get pascal triangle
1
1
1 1
1 2 1
1 3 3 1
1 4 6 4 1

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This comment has been removed by the author.

How to print this output
# # # # #
# # # #
# # #
# #
#

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This comment has been removed by the author.

class Test
{
public static void main(String args[])
{
for(int i=4;i>=1;i--)
{
for(int j=1;j<=i;j++)
{
System.out.print("#");
}
System.out.print("\n");
}
}
}

Reply

Write a program, which prints stars as triangles
1.your program can print 3 diffrent triangles( left triangle, right triangle and centered triangle)
2. Your program ask the user, which kind of triangles has to be printed
( hint: use switch statment)
3. Your program ask the user, how many rows of stars the user want to print
if the user requires 3 the and left triangles, the out put should be like :

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for (int i=4;i>=1;i--)
{
for(int j=1;j<=i;j++)
{
System.out.print("*");
}
System.out.println();
}

Reply

for(int i=0;i<5;i+=2)
{
for(int j=0;j<=i;j++)
{
System.out.print("*");
}
System.out.println();
}

for (int i=3;i>=0;i-=2)
{
for (int j=1;j<=i;j++)
{
System.out.print("*");
}
System.out.println();
}

Reply

What about as function for the implementation of the Triangle Classification Algorithm?

Reply

hi guys can you help me draw this shape in for loop....

*
*A*
*A*A*

Reply

can you help me draw pascal tringle without arrey

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This comment has been removed by the author.

for(int j=5;j>0;j--)
{
for(int i=0;i<j;i++)
{
System.out.print(j);
}
System.out.println();
}
}

Reply

for(int i=0;i<3;i++)
{
for(int j=0;j<i*2+1;j++)
{
if(j%2!=0)
System.out.print("A");
else
System.out.print("*");


}
System.out.println();

}

Reply

for (int i=0; i<3; i++)
{
for (int k=0; k<6-i; k++)
{
System.out.print(" ");
}
for (int j=0; j=0; i--)
{
for (int k=6-i; k>0; k--)
{
System.out.print(" ");
}
for (int j=i*2+1; j>0; j--)
{
System.out.print("*");
}
System.out.println("");
}

Reply

Can you please share with output, it will be helpful for us

Reply

how do i get this
-----1-----
----333----
---55555---
--7777777--
-999999999-

Reply

How can i print this

*
* *
* * *
* * * *
* * * *
* * * *
* * *
* *
*

Reply

brack to band kaun kare ga munna ache se shikh lo uske baad kisi ko sikana

Reply

can you help me how about this
convert this to java

int a,b;

for(a=1;a<=13;a++)
{
for(b=13;b>=a;b-=2)
{
cout<<"* ";
}
cout<<"\n\n";
}
system("PAUSE");
return 0;

}

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can you help me to print this?
*
***
*****
***
*

Reply

Very informative article.Thank you author for posting this kind of article .


http://www.wikitechy.com/view-article/java-program-to-print-floyds-triangle-example



Both are really good,
Cheers,
Venkat

Reply

Very informative article.Thank you author for posting this kind of article .


http://www.wikitechy.com/view-article/java-program-to-print-floyds-triangle-example



Both are really good,
Cheers,
Venkat

Reply

class pattern
{
void main()
{
for(int i=5;i>=0;i--)
{
for (int j=i;j>=1;j--)
{System.out.print(i);
}
System.out.println();
}
}
}

Reply

can you help me print this
1 1
11 11
111 111
1111 1111
1111111111

Reply

Can you please help me print a parallelogram shape

Reply

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how can i print this using for loop and scanner in java just don't mind the (-)
*****
-****
--***
---**
----*

Reply

how can i print this using for loop and scanner in java just don't mind the (-)
----0
---01
--012
-0123
01234

Reply

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