Lesson 11

The `то` loop, `шикастан` and `давом`

In this lesson: you will write a loop when you do not know in advance how many steps it will make.

The whole lesson on one page

The `то` loop, `шикастан` and `давом`

In this lesson: you will write a loop when you do not know in advance how many steps it will make.

`то`

то (condition) { … } ("while") repeats the commands while the condition is дуруст:

1тағ шумора = 5;
2то (шумора > 0) {
3  чоп(шумора);
4  шумора = шумора - 1;
5}
6чоп("Оғоз!");

Something must change inside the loop, so that one day the condition becomes нодуруст. Otherwise the loop never ends.

The digits of a number

1тағ адад = хонданиРақам();
2тағ шумора = 0;
3то (адад > 0) {
4  адад = Риёзӣ.поён(адад / 10);
5  шумора++;
6}
7чоп("Рақамҳо:", шумора);

Input

`шикастан`: leaving the loop

1// Reads numbers until 0 and prints their sum
2тағ ҷамъ = 0;
3то (дуруст) {
4  тағ рақам = хонданиРақам();
5  агар (рақам === 0) {
6    шикастан;
7  }
8  ҷамъ += рақам;
9}
10чоп("Ҷамъ:", ҷамъ);

Input

то (дуруст): this loop never ends by itself. You leave it with шикастан ("break").
давом ("continue") ends the current step and goes on to the next one.

Task: Number of digits

Read a positive whole number and print how many digits it has.

Input: One positive number.

Output: The number of digits.

Task: Backwards

Read a positive whole number and print its digits in reverse order: from 123 you get 321, from 1200 you get 21.

Input: One positive number.

Output: The reversed number.

Task: Sum until zero

Read numbers one at a time until a 0 comes. Print the sum of all the numbers.

Input: Numbers, each on a separate line; the last one is 0.

Output: The sum.

The то loop, шикастан and давом