Loops

Loops

While Loop

Repeats while a condition is true:

var{x, 0}\
while{var{x} < 5}-
    pcType{var{x}}\
    var{x, var{x} + 1}\
--\

Always update the condition variable inside the loop, or it will run forever.

For Loop

Iterates a variable from start up to (not including) end:

for{i, 0, 5}-
    pcType{var{i}}\
--\

This prints 0 1 2 3 4.

Access the loop variable with var{i} inside the body.

Examples

Count to 10:

for{i, 1, 11}-
    pcType{var{i}}\
--\

Sum numbers 1–5:

var{total, 0}\
for{i, 1, 6}-
    var{total, var{total} + var{i}}\
--\
pcType{var{total}}\

Repeat until input:

var{done, 0}\
while{var{done} == 0}-
    pcAsk{"Type 1 to stop: "}\
    var{done, input{ans}}\
--\

Difference Between while and for

	while	for
Use when	You don't know how many iterations	You know start and end
Condition	Any boolean expression	Number range
Risk	Can loop forever	Always terminates