# Swift Program to Print half Diamond Binary Pattern

This tutorial will discuss how to write swift program to print half diamond binary pattern.

Binary pattern is a sequence of “0” and “1” which is used to develop different patterns or shapes like pyramid, rectangle, cross, etc.

To create a half diamond binary pattern, we can use any of the following methods −

• Using nested for loop

• Using init() Function

• Using stride Function

Below is a demonstration of the same −

Input

Suppose our given input is −

Num = 3


Output

The desired output would be −

0
0 1
0 1 0
0 1
0


## METHOD 1- USING NESTED FOR LOOP

We can create a half diamond binary pattern or any other pattern using nested for loops. Here each for loop handle different tasks such as outermost for loop is used for new rows, and nested for loop is used to print binary number pattern.

### Example

The following program shows how to print half diamond binary pattern using nested for loop.

import Foundation
import Glibc

// Size of the pattern
let num = 3

// Outer for loop is used to handle the
// total number of rows in upper half
// diamond binary pattern
for m in 1...num {
// Printing upper half diamond binary pattern
for n in 1...m {
if n % 2 == 0 {
print(1, terminator : " ")
}
else {
print(0, terminator : " ")
}
}
print("")
}

// Outer for loop is used to handle the
// total number of rows in lower half
// diamond binary pattern
for p in 1...num-1 {
// Printing lower half diamond binary pattern
for n in 1...num-p {
if n % 2 == 0 {
print(1, terminator : " ")
}
else {
print(0, terminator : " ")
}
}
print("")
}


### Output

0
0 1
0 1 0
0 1
0


Here, in the above code, we use nested for loops to print binary numbers in the half diamond pattern. To print binary numbers, we check remainder. If the remainder is equal to 0, then print 1. Otherwise print 0.

## METHOD 2- USING INIT() FUNCTION

Swift provide an in-built function named String.init(). Using this function we can able to create any pattern. String.init() function create a string in which the given character is repeated the specified number of times.

### Syntax

Following is the syntax −

String.init(repeating:Character, count: Int)


Here, repeating represent the character which this method repeats and count represent the total number of time the given character repeat in the resultant string.

### Example

The following program shows how to print half diamond binary pattern using string.init() function.

import Foundation
import Glibc

// Size of the pattern
let num = 6

// Creating upper half diamond binary pattern
// Using String.init() function
for x in 1...num {
print(String.init(repeating: "10", count: x))
}

// Creating lower half diamond binary pattern
// Using String.init() function
for x in 1...num-1 {
print( String.init(repeating: "11", count: num-x))
}


### Output

10
1010
101010
10101010
1010101010
101010101010
1111111111
11111111
111111
1111
11


## METHOD 3- USING STRIDE FUNCTION

Swift provide an in-built function named stride(). The stride() function is used to move from one value to another with increment or decrement. Or we can say stride() function return a sequence from the starting value but not include end value and each value in the given sequence is steps by the given amount.

### Syntax

Following is the syntax −

stride(from:startValue, to: endValue, by:count)


Here,

from − Represent the starting value to use for the given sequence.

to − Represent the end value to limit the given sequence

by − Represent the amount to step by with each iteration, here positive value represents upward iteration or increment and negative value represent the downward iteration or decrement.

### Example

The following program shows how to print half diamond binary pattern using stride() function.

import Foundation
import Glibc

// Size of the pattern
let num = 8

// Handle the length of the upper half pattern
for m in 1...num {

// Printing upper half diamond binary pattern
// Using stride() function
for n in stride(from: 1, to: m, by: 1) {
if n % 2 == 0 {
print(1, terminator : " ")
}
else{
print(0, terminator : " ")
}
}
print("")
}

// Handle the length of the lower half pattern
for x in 0...num-1 {
// Printing lower half diamond binary pattern
// Using stride() function
for n in stride(from: num, to: x, by: -1) {
if n % 2 == 0 {
print(1, terminator : " ")
}
else {
print(0, terminator : " ")
}
}
print("")
}


### Output

0
0 1
0 1 0
0 1 0 1
0 1 0 1 0
0 1 0 1 0 1
0 1 0 1 0 1 0
1 0 1 0 1 0 1 0
1 0 1 0 1 0 1
1 0 1 0 1 0
1 0 1 0 1
1 0 1 0
1 0 1
1 0
1


Here, repeating represent the character which this method repeats and count represent the total number of time the given character repeat in the resultant string.

Updated on: 30-Nov-2022

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