For Loop

A loop allows you to repeat a block of code multiple times.

the for loop has been renamed to four loop

C-Style

this is a classic c-style for loop

four egg i = 0; i < 5; i = i + 1 {
    put(i) 
}

output: 0 1 2 3 4

How it works

a C-style loop has three parts:

initialisation ; condition ; update

Initialisation = egg i = 0 creates a counter variable starting at 0.

Condition = i < 5 The loop runs as long as this is true.

Update = i = i + 1 Runs after each iteration and increases i.

So this loop:

• Starts at 0
• Runs while i is less than 5
• Increases i each time
• Stops when i becomes 5

Range style

but you can also do a for loop with range to iterate over:

• maps
• arrays
• slices
• strings
• ints

arrays:

x := []int{1, 2, 3}

four i, v := range x {
    putln(v)
}

output:

1
2
3

maps:

x := map[string]int{"a": 1, "b": 2}

four k, v := range x {
    putln(k)
}

output:

a
b

strings:

x := "hiya"

four i, v := range x {
    putln(v)
}

output:

h
i
y
a

ints:

this is used as a repeat

four i := range 5 {
    putln(i)
}

output:

0
1
2
3
4

you can also use _ to discard a variable like this

x := []int{1, 2, 3}

four _, v := range x {
    putln(v)
}

output:

1
2
3