3.Triangle pattern

 

I have added numbers to make you understand how we will create this pattern using for loop

• As we know we first see how many lines of code needs to be printed, in this case it is 9
• Since we will take user input it can be simply n which will be taken from user
• As we can see for each line the stars printed are same as i's value
• For i=1, stars printed is 1,for i=n it is n
• So j loop that will decide what needs to be printed will iterate from 1 to i
• Remember to print "\n" to make it move to next line

Code

#include<stdio.h>

#include<conio.h>

void main(){

int i,j,n;

clrscr();

printf("Enter number of lines ");

scanf("%d",&n);

for(i=1;i<=n;i++)

    {

          for(j=1;j<=i;j++)

               {

                 printf("*");   

                   }

           printf("\n");

     }

getch();

}

Note: scanf is used for taking user input