Yabasic - Data

[Mainchip]

Hi guys,

I was just wondering if this was possible:

Code:

Label members
read member_name$,member_age,member_eye_colour$
data John,100,blue
data Jim,50,green
data Jane,25,brown

Is it possible for me to print on screen Jane's details without printing out anyone else's?

Thank you,

Mainchip.

[Cybermonkey]

In this case I would choose an array. So you can access the variable by its index. In this case you can use a for-next-loop to read the datas. Example (I don't know for sure if yabasic's index starts with 0 or 1):

Code:

DIM member_name$(3)
DIM member_age(3)
DIM member_eye_colour$(3)
for i = 1 to 3: rem // so index starts with 1 here ...
read  member_name$(i),member_age(i),member_eye_colour$(i)
next
rem // print out Jane's details
print  member_name$(3),member_age(3),member_eye_colour$(3)
data John,100,blue
data Jim,50,green
data Jane,25,brown

[Mainchip]

Hi,

Thanks for your reply, this will work fine thank you,

What does this line do?

Code:

for i = 1 to 3:

And yabasic does start at 0 

Thank you,

Mainchip.

[Cybermonkey]

Ok, first, if Yabasic starts at 0 you can also write

Code:

for i=0 to 2

But before, you only have to DIM the arrays at (2)[i.e. value from 0 to 2 = three values]. This will save memory, although in this case it isn't necessary I think ...
Ok, next:

What does this line do?

Code:
for i = 1 to 3:

This is a loop. Every command between FOR and NEXT is executed i-times.
FOR i=1 to 3
First run: i has got the value of 1
NEXT -> Now the value of i is increased by 1 (or alternatively by a STEP given in the FOR statement: Example: For i = 1 to 10 STEP 2)
Second run: i has now the value of 2
NEXT -> Now the value of i is increased by 1
And so on ... until the second value (in this case 3) is reached.

[Mainchip]

Ah, cheers for that  makes more sense now lol

Mainchip.