- To print sideway triangle pattern using numbers
User Input: 3
Output:
A A B A B C A B A
fun main(args: Array<String>) {
print("Enter number of columns : ")
val userInput = readLine()!!
var columns:Int =userInput.toInt()
var trows:Int
var k:Int
var c:Char
trows=2*columns-1
k=1
for(i in 1..trows) {
c='A'
for(j in 1..k) {
print(c++ +" ")
}
if(i<columns)k++;
else k--;
println("")
}
}
Enter number of columns: 4 A A B A B C A B C D A B C A B AProgram
Main Logic :
trows=2*columns-1; // trows : total rows to print
k=1; // Used to trigger decreasing order of number
for(i in 1..trows) {
c='A'
for(j in 1..k) {
print(c++ +" ");
}
//check for position change at which triangle number value to decrease
if(i<columns)k++;
else k--;
println("");
}
You can print the same pattern in small alphabets, just set c='a'