Conditional ​

If expressions allow you to manipulate the algorithm according to certain conditions. The if and else keywords use for if expressions in Jule.

if Statement ​

If the provided condition is true the block is executed, otherwise it is not executed. It is also the beginning of a new chain of conditions.

For example:

fn main() {
    let x: any
    if x == nil {
        outln("x is not initialized")
    }
}

else if Statement ​

If the preceding if and else if expressions have not been fulfilled, it is a condition presented as an alternative to them.

For example:

fn main() {
    let x = 100
    if x > 1000 {
        outln("greater than thousand")
    } else if x < 100 {
        outln("less than hundred")
    } else if x == 100 {
        outln("equals to hundred")
    }
}

// OUTPUT: equals to hundred

else Statement ​

It is the block that will be executed unconditionally if the previous if and else if expressions are not fulfilled.

For example:

fn main() {
    let x = 20
    if x == 20 {
        outln("x is 20")
    } else {
        outln("x is not 20")
    }
}