« for loop
Print one line
#include <stdio.h>
#include <math.h>
int main(void){
char str[]="*";
int i;
for (i=1;i<=5;i++){
printf("%s",str);
}
return 0;
}
Output
*****
Print multiline with decreasing number of stars
#include <stdio.h>
#include <math.h>
int main(void){
char str[]="*";
int i=5;
int j;
for (i=5;i>=1;i--){
for (j=1;j<=i;j++){
printf("%s",str);
}
printf("\n");
}
return 0;
}
Output is here
*****
****
***
**
*
Print multiline with increasing number of stars
#include <stdio.h>
#include <math.h>
int main(void){
char str[]="*";
int i=1;
int j;
for (i=1;i<=5;i++){
for (j=1;j<=i;j++){
printf("%s",str);
}
printf("\n");
}
return 0;
}
*
**
***
****
*****
Conical pattern
#include <stdio.h>
#include <math.h>
int main(void){
char str[]="*";
int i=1;
int k=1;
int j;
for (i=1;i<=5;i++){
for (k=i;k<=5;k++){
printf(" ");// adding space before
}
for (j=1;j<=2*i-1;j++){
printf("%s",str); // printing *
}
printf("\n");
}
return 0;
}
*
***
*****
*******
*********
Reverse Conical pattern
#include <stdio.h>
#include <math.h>
int main(void){
char str[]="*";
int i=1;
int k=1;
int j;
for (i=5;i>=0;i--){
for (k=i;k<=5;k++){
printf(" ");// adding space before
}
for (j=1;j<=2*i-1;j++){
printf("%s",str); // printing *
}
printf("\n");
}
return 0;
}
*********
*******
*****
***
*
In all the above codes you can display number in place of * .
printf("%d",i);
Above line to be used in place of
printf("%s",str);
Output is here .
555555555
4444444
33333
222
1
One more pattern
#include <stdio.h>
int main(void){
int i,j,k,blank;
for(i=11;i>=0;i--){
if(i%2==0){
for(j=1;j<=(i/2);j++){
printf("*");
}
j=j-1;
k=11-(2*j);
for(blank=1;blank<=k;blank++){
printf("#");
}
for(j=1;j<=(i/2);j++){
printf("*");
}
printf(" i=%d, i=%d,j=%d,k=%d blank=%d\n",i,i/2,j,k,blank);
}
}
return 0;
}
*****#***** i=10, i=5,j=6,k=1 blank=2
****###**** i=8, i=4,j=5,k=3 blank=4
***#####*** i=6, i=3,j=4,k=5 blank=6
**#######** i=4, i=2,j=3,k=7 blank=8
*#########* i=2, i=1,j=2,k=9 blank=10
########### i=0, i=0,j=1,k=11 blank=12
Create number series like this
1,2,3,4,5,6,7,8,9
1,3,5,7,9
1,4,7
1,5,9
1,6
1,7
1,8
1,9
1
Solution
#include <stdio.h>
int main()
{
for(int i=1; i<10; i++){
for (int j=1;j<10; j=j+i){
printf(" %d ,",j);
}
printf("\n");
}
return 0;
}