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## Merge two inverted triangle pattern

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Merge two inverted triangle pattern in C- in this tutorial we will cover techniques to merging the inverted right triangle and inverted mirror right triangle side by side. Triangle Pattern is made using Star Symbol(*).

The following Pattern program is written in three unique manners:

• For Loop
•  While Loop
•  Do-While Loop

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we have to specify a certain number of rows and columns. According to the above program number of rows specified 5 and the number of Columns specified  7.

The Star Symbol (any other symbol can take) is picked here for demonstration.

This issue can also be solved by observing that the two triangle is printed side by side.

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## 1. Merge two inverted triangle pattern: For Loop

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### Algorithm

Input: Let, three variables say r,c,n,m. The value of n and m will be given by the user.

step 1: Input values for n and m where n is Row size and m is column size

step 2: r=1 and outer loop will be performed as long as r<=n

step 3: c=1

step 4: inner loop will be performed as long as  c<=m

step 4.1: check if (if(c<=n+1-r||c>=n-1+r)) is true then

print symbol star ( “*”)

else

print  “blank space”

step 5: j=j+1

step 6: End inner loop

step 7: next line start

step 8: i= i+1

step 9:  End outer loop

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### Source Code

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```int main()
{
int r,c,n,m;
printf("\n\tEnter row no:");
scanf("%d",&n);
printf("\n\tEnter column no:");
scanf("%d",&m);
printf("\n\t");
for(r=1; r<=n; r++)
{
for(c=1; c<=m; c++)
{
if(c<=n+1-r||c>=n-1+r)            {                 printf("*");            }
else
printf(" ");
}
printf("\n");
printf("\t");
}
return 0;
}
```

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## 2. Merge two inverted triangle pattern: while Loop

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```int main()
{
int r,c,n,m;
printf("\n\tEnter no:");
scanf("%d",&n);
printf("\n\tEnter no:");
scanf("%d",&m);
printf("\t");
r=1;
while(r<=n)
{
c=1;
while(c<=m)
{              if(c<=n+1-r||c>=n-1+r)             {
printf("*");
}
else
{
printf(" ");
}
c++;
}
r++;
printf("\n");
printf("\t");
}
}

```

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## 3. Merge two inverted triangle pattern: do..while Loop

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```int main()
{
int r,c,n,m;
printf("\n\tEnter no:");
scanf("%d",&n);
printf("\n\tEnter no:");
scanf("%d",&m);
printf("\t");
r=1;
do
{
c=1;
do
{           if(c<=n+1-r||c>=n-1+r)
{
printf("*");
}
else
{
printf(" ");
}
c++;
}while(c<=m);

r++;
printf("\n");
printf("\t");
} while(r<=n);
}

```

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## Recommended posts are following

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