IF condition then-block /else else-block
If condition is TRUE, evaluates the block.
IF is a native value.
- condition -- (Type: any)
- then-block -- (Type: block)
- /else -- If not true, evaluate this block
- else-block -- (Type: block)
if: native[ "If condition is TRUE, evaluates the block." condition then-block [block!] /else "If not true, evaluate this block" else-block [block!] ]