Go if else

In Go, the if-else statement is used to control the program flow based on a Boolean condition. The syntax of the if-else statement is as follows:

if condition {
    // code to be executed if the condition is true
} else {
    // code to be executed if the condition is false
}

The condition in the if statement is a Boolean expression that evaluates to either true or false. If the condition is true, the code block immediately following the if statement is executed. If the condition is false, the code block immediately following the else statement is executed.

Here's an example of using the if-else statement in Go:

x := 10
if x < 0 {
    fmt.Println("x is negative")
} else if x == 0 {
    fmt.Println("x is zero")
} else {
    fmt.Println("x is positive")
}

In this example, the program checks the value of the variable x. If x is less than zero, the message "x is negative" is printed. If x is equal to zero, the message "x is zero" is printed. If x is greater than zero, the message "x is positive" is printed.

You can also use the if statement without the else block, as shown in the following example:

x := 10
if x > 5 {
    fmt.Println("x is greater than 5")
}

In this example, the program checks the value of the variable x. If x is greater than 5, the message "x is greater than 5" is printed. If x is less than or equal to 5, no code is executed after the if statement.

It's worth noting that Go also supports the if statement with a short statement, which allows you to declare and initialize a variable in the same line as the condition. For example:

if x := 10; x > 5 {
    fmt.Println("x is greater than 5")
}

In this example, the program declares and initializes the variable x with a value of 10 in the same line as the if statement. If x is greater than 5, the message "x is greater than 5" is printed.