for range start:end:step

[xushiwei]

Proposal

for i <- start:end:step {
    ...
}

for i := range start:end:step {
    ...
}

for range start:end:step {
    ...
}

For example:

for range :100 {
    ...
}

Background

None

Workarounds

for i := 0; i < 100; i++ {
    ...
}