For

for is Go's only looping construct.

Most basic type has a single condition: for i <= 3 {} A classic initial/condition/after for loop: for j:=7; j<=9; j++ {} for without a condition will loop repeatedly until you break out of the loop or return from the enclosing function

You can also continue to the next iteration of the loop.

for forms will expand with range statements, channels and other data structures.