# Kotlin Code To Create Pyramid and Pattern

## Programs to print triangles using *, numbers and characters

### Example 1: Program to print half pyramid using *

*
* *
* * *
* * * *
* * * * *

Source code

fun main(args: Array<String>) {
val rows = 5

for (i in 1..rows) {
for (j in 1..i) {
print("* ")
}
println()
}
}

### Example 2: Program to print half pyramid a using numbers

1
1 2
1 2 3
1 2 3 4
1 2 3 4 5

Source Code

fun main(args: Array<String>) {
val rows = 5

for (i in 1..rows) {
for (j in 1..i) {
print("\$j ")
}
println()
}
}

### Example 3: Program to print half pyramid using alphabets

A
B B
C C C
D D D D
E E E E E

Source Code

fun main(args: Array<String>) {
val last = 'E'
var alphabet = 'A'

for (i in 1..last - 'A' + 1) {
for (j in 1..i) {
print("\$alphabet ")
}
++alphabet

println()
}
}

## Programs to print inverted half pyramid using * and numbers

### Example 4: Inverted half pyramid using *

* * * * *
* * * *
* * *
* *
*

Source Code

fun main(args: Array<String>) {
val rows = 5

for (i in rows downTo 1) {
for (j in 1..i) {
print("* ")
}
println()
}
}

### Example 5: Inverted half pyramid using numbers

1 2 3 4 5
1 2 3 4
1 2 3
1 2
1

Source Code

fun main(args: Array<String>) {
val rows = 5

for (i in rows downTo 1) {
for (j in 1..i) {
print("\$j ")
}
println()
}
}

## Programs to display pyramid and inverted pyramid using * and digits

### Example 6: Program to print full pyramid using *

*
* * *
* * * * *
* * * * * * *
* * * * * * * * *

Source Code

fun main(args: Array<String>) {
val rows = 5
var k = 0

for (i in 1..rows) {
for (space in 1..rows - i) {
print("  ")
}

while (k != 2 * i - 1) {
print("* ")
++k
}

println()
k = 0
}
}

### Example 7: Program to print pyramid using numbers

1
2 3 2
3 4 5 4 3
4 5 6 7 6 5 4
5 6 7 8 9 8 7 6 5

Source Code

fun main(args: Array<String>) {
val rows = 5
var k = 0
var count = 0
var count1 = 0

for (i in 1..rows) {
for (space in 1..rows - i) {
print("  ")
++count
}

while (k != 2 * i - 1) {
if (count <= rows - 1) {
print((i + k).toString() + " ")
++count
} else {
++count1
print((i + k - 2 * count1).toString() + " ")
}

++k
}
k = 0
count = k
count1 = count

println()
}
}

### Example 8: Inverted full pyramid using *

* * * * * * * * *
* * * * * * *
* * * * *
* * *
*

Source Code

fun main(args: Array<String>) {
val rows = 5

for (i in rows downTo 1) {

for (space in 1..rows - i) {
print("  ")
}

for (j in i..2 * i - 1) {
print("* ")
}

for (j in 0..i - 1 - 1) {
print("* ")
}

println()
}
}

### Example 9: Print Pascal’s triangle

1
1   1
1   2   1
1   3   3    1
1   4   6   4   1
1   5   10   10  5   1

Source Code

fun main(args: Array<String>) {
val rows = 6
var coef = 1

for (i in 0..rows - 1) {

for (space in 1..rows - i - 1) {
print("  ")
}

for (j in 0..i) {
if (j == 0 || i == 0)
coef = 1
else
coef = coef * (i - j + 1) / j

System.out.printf("%4d", coef)
}

println()
}
}

### Example 10: Print Floyd’s Triangle.

1
2 3
4 5 6
7 8 9 10

Source Code

fun main(args: Array<String>) {
val rows = 4
var number = 1

for (i in 1..rows) {

for (j in 1..i) {
print("\$number ")
++number
}

println()
}
}

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Disclaimer: The information and code presented within this recipe/tutorial is only for educational and coaching purposes for beginners and developers. Anyone can practice and apply the recipe/tutorial presented here, but the reader is taking full responsibility for his/her actions. The author (content curator) of this recipe (code / program) has made every effort to ensure the accuracy of the information was correct at time of publication. The author (content curator) does not assume and hereby disclaims any liability to any party for any loss, damage, or disruption caused by errors or omissions, whether such errors or omissions result from accident, negligence, or any other cause. The information presented here could also be found in public knowledge domains.