TYL PROGRAMMING LANGUAGE
▶ LOOPING BY INDEX
Looping by index is the repeating of code execution for a set number of times.

Looping by index signature:
[INDEX] [RANGE] ~

Consider this code:
sum 0
index 4 ~
num index + 1
sum ++ num
print sum
^
1
3
6
10
In line 'index 4 ~', index will be a local numeric variable of the looping statement, and the value 4, is the upper limit. The index will get the numbers from zero until 4 (not including 4): 0, 1, 2, 3.

In the repeat block, index variable will be used, and each time it will have a different value. The code in the repeat block is summing the numbers 1, 2, 3, 4.

The above looping statement can be written in one line:
sum 0
index 4 ~ print sum ++ index + 1
Average Calculator:
sum 0
numberslen 4
index numberslen ~ sum ++ index + 1
print sum / numberslen
2.5
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