Loop
In this example, we use for loops and while loops to iterate over an array.
For Loop Expression
The for loop is analogous to a C-style for loop:
for init; condition; increment {
// loop body
}
The loop initializes the variables in the init part before it starts. When the loop starts, it tests the condition and executes the loop body if the condition is true. After that, it runs the increment expression and repeats the process until the condition is false.
In MoonBit, the for loop is more expressive than the C-style for loop. We will explain it in the following chapters.
While Loop Expression
The while loop is also similar to the C-style while loop.
It tests the condition before executing the loop body. If the condition is true, it executes the loop body and repeats the process until the condition is false.
MoonBit also supports both continue and break statements within the loop.
fn main {
let array = [1, 2, 3]
println("for loop:")
for i = 0; i < array.length(); i = i + 1 {
println("array[\{i}]: \{array[i]}")
}
println("\nwhile loop:")
let mut j = 0
while true {
println("array[\{j}]: \{array[j]}")
j = j + 1
if j < array.length() {
continue
} else {
break
}
}
}