Given a number n and we have to print the arrow star pattern of maximum n number of stars.
The star pattern of input 4 will look like −
Example
Input: 3 Output:
Input: 5 Output:
The approach used below is as follows −
- Take input in integer.
- Then print n spaces and n stars.
- Decrement till n>1.
- Now increment till n.
- And print spaces and stars in increasing order.
Algorithm
Start In function int arrow(int num) Step 1-> declare and initialize i, j Step 2-> Loop For i = 1 and i <= num and i++ Loop For j = i and j < num and j++ Print a space Loop For j = i and j <= num and j++ Print "*" Print newline Step 3-> Loop For i = 2 and i <= num and i++ Loop For j= 1 and j < I and j++ Print a space Loop For j = 1 and j <= i and j++ Print "*" Print newline In function int main() Step 1-> declare and initialize num = 4 Step 2-> call arrow(num)
Example
#include <stdio.h>
// arrow function
int arrow(int num) {
int i, j;
// Prints the upper part of the arrow
for (i = 1; i <= num; i++) {
// to print the spaces
for (j = i; j < num; j++) {
printf(" ");
}
// to print the * for the pattern
for (j = i; j <= num; j++) {
printf("*");
}
printf("\n");
}
// Prints lower part of the arrow
for (i = 2; i <= num; i++) {
// to print the spaces
for (j = 1; j < i; j++) {
printf(" ");
}
// to print the * for the pattern
for (j = 1; j <= i; j++) {
printf("*");
}
printf("\n");
}
return 0;
}
int main() {
// get the value from user
int num = 4;
// function calling
arrow(num);
return 0;
}Output
If run the above code it will generate the following output −