Ring Documentation Walkthrough #3 – Variables & Comments

On the previous post i’ve talked about how to start your Hello, World! app in Ring.
It’s time to move on and got through The Variables.

Well, comparing to Python they both work in the same way, you just need to do this,
This is the syntax :

variable = value

Examples :

x = 5
y = 10
see x + y + nl

Another one :

first = "Mercedes"
last = "Benz"
see first + "-" + last

Ring is a weakly typed language, to make it clear .. string + int = string & int + string = int.

Example :

see "Enter text : " give text
see "Enter a number : " give number

see 'before conversion : ' + type(number) + nl #type() just like in Python, is a function to know the type of a variable

number = Number(number) #Number() is a function to convert string to number

see 'after conversion : ' + type(number) + nl

see 'final text : ' + text + " " + number

Results:

input : Jump Street
input : 23
output : before conversion : STRING
output : after conversion : NUMBER
output : Jump Street 23

The example above, the number variable was int but it was converted to str.

Last one :

x = 2000 #x is a number
y = "16" #y is a string
see x + y #string (y) is converted to an int.

I think you now should be able to understand how it works.

I will add one last thing to the post and it’s ‘Comments’
It’s cool actually because you can use one of 3 types of commenting.

/* bla bla bla
  bla bla */ (Like C#)
# ding dong (Like Python)
// boom bam (Like PHP)

Simple as that.

amrESSAM.

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