For

The Go for loop has three forms, only one of which hassemicolons:

• for init; condition; post { } - a loop using the syntax borrowed from C;
• for condition { } - a while loop, and;
• for { } - an endless loop.

Short declarations make it easy to declare the index variable right in the loop.

sum := 0
for i := 0; i < 10; i++ {
    sum = sum + i
}

Note that the variable i ceases to exist after the loop.