Groovy

This is the language that I mostly worked with when working with Jenkins.

Variables §

// using their type
String x = "Hellow World"
Integer n = 19
boolean flag = true
 
// using the def keyword
def x = "Hellow World"
def n = 19
def flag = true

How to Print §

// print without adding a newline character
print("Hellow World")
 
// print followed by a newline character
println("Hellow World")
 
// formatting strings
printf("%s is %d years old", "David", 305)

Conditional Statements §

if ( ... ) {
	// do something
} else if ( ... ) {
	// do something
} else {
	// do something
}

Loops §

// loop n number of times
for (into i=0; i < 5; i++) {
	println(i)
}
 
// loop using array, method 1
def myList = ["a", "b", "c"]
 
for (i in myList) {
	println(i)
}
 
// loop using array, method 2
def myList = ["a", "b", "c"]
 
myList.each { item ->
	println(i)
}

Functions §

// no parameters
def myFunction() {
	// do something
}
 
// with a return
def myFunction() {
	return "Hello World"
}
 
// with parameters
def myFunction(int a, int b, String c) {
	return a + b
}

Exception Handling §

try {
	// do something
} catch (Exception e) {
	println("INFO: An error occurred: ${e.message}")
}