How to Safely Convert an int64 to an int in Go?

Conversion Strategies for int64 to int in Go

When working with different data types in Go, it's often necessary to convert between them. One common scenario is converting an int64 to an int.

To achieve this conversion, you can use a straightforward type conversion:

var a int
var b int64
int64(a) < b

It's essential to note that when comparing two values of different types, the conversion should always be done from the smaller to the larger. This ensures that the values are properly represented:

var x int32 = 0
var y int64 = math.MaxInt32 + 1 // y == 2147483648
if x < int32(y) {
    // This evaluates to false, because int32(y) is -2147483648
}

Applying this principle to your example, you can convert the maxInt int64 value to an int as follows:

for a := 2; a < int(maxInt); a++ {
    // ...
}

Using this conversion, you can safely iterate over the values within the correct range, avoiding any overflow issues when maxInt exceeds the maximum int value on your system.

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