What you write in C # is written in Ruby like this

Note

Only describe the writing styles that you often use personally. It is still incomplete. I will update it when I have free time.

Standard stream

Standard output

C#

Console.Write("No line breaks");
Console.WriteLine("With line breaks");

Ruby

print "No line breaks"
puts  "With line breaks"

Standard input

C#

//If there is only one value
var single = Console.ReadLine();
//If there are multiple
var multiple = Console.ReadLine().Split(",");

Ruby

#If there is only one value
single = gets
#If there are multiple
multiple = gets.split(",")

If it is just separated by a space, it seems that you can write it like this. multiple = gets.split Ruby is amazing.

Loop processing

for statement

C#

for (var i = 0; i < 10; i++)
{
    Console.WriteLine(i);
}

Ruby

for i in 0..9
    puts i
end

foreach statement

C#

var array = new int[5] {1, 2, 3, 4, 5};
        
foreach (var i in array)
{
    Console.WriteLine(i);
}

Ruby

array = (1..5)

array.each do |i|
    puts i
end

While statement

C#

var num = 0;

while (num < 5)
{
    Console.WriteLine(num);
    num++;
}

Ruby

num = 0

while num < 5 
    puts num
    num += 1
end

It looks like Ruby doesn't have increments and decrements. Instead? Apart from adding 1, it seems that there are succ and next.

succ

Ruby

num = 1
apt = "a"
letter = "z"

puts num.succ       #output: 2
puts apt.succ       #output: b
puts letter.succ    #output: aa

This is convenient. It's also interesting that aa is next to z (I don't know where to use it ...) ~~ However, there seems to be no corresponding decrement. ~~ There seems to be something close ...

pred

Ruby

num = 1
puts num.pred       #output: 0

However, when I did it in the alphabet, I got an error. Well, there shouldn't be such a problem!

Conditional branch

if statement

C#

var name = "Takeshi";

if (name == "Takeshi")
{
    Console.WriteLine("Gata Gata Gata Gata Gata Gata");
}
else if (name == "Takuro")
{
    Console.WriteLine("Unfortunately handsome");
}
else
{
    Console.WriteLine("Mika");
}

Ruby

name = "Takeshi"

if name == "Takeshi"
    puts "Gata Gata Gata Gata Gata Gata"

elsif name == "Takuro"
    puts "Unfortunately handsome"

else
    puts "Mika" 
end

Personally, Ruby may be a little hard to see ...

Switch statement

C#

var energyDrink = "Monster";

switch (energyDrink)
{
    case "Monster":
        Console.WriteLine("Has a lot of taste");
        break;
        
    case "Zone":
        Console.WriteLine("Cheap and big");
        break;
        
    default:
        Console.WriteLine("Red Bull seems to cut the price");
        break;
}

Ruby

energyDrink = "Monster"

case energyDrink

    when "Monster"
        puts "Has a lot of taste"

    when "Zone"
        puts "Cheap and big"

    else
        puts "Red Bull seems to cut the price"
end

I'm grateful that it was troublesome to write breaks one by one.

Ternary operator

C#

var num = 10;
var results = (num == 10) ? "true" : "false";

Ruby

num = 10;
results = (num == 10) ? "true" : "false";

This guy didn't turn into a stone.