Write your IngotScript code in a file with the extension .is.
Run the IngotScript code using the command palette (Right Click -> Run IngotScript).
Example
let a = 10
let b = 3.14
let c = "abc"
print a
print b
print c
if a > 5
print "a is greater than 5"
end
let i = 1
while i <= 5
print i
let i = i + 1
end
for j = 1 to 5
print j
end