Loops and conditionals

One of the weaker things in bash are the conditionals, when compared to the simplicity and elegance of a higher language. I know the syntax of both and there are many, many caveats in the bash conditionals that make them non-trivial.

Example 1

def var1 = true
node{
  stage('HW1a'){
    if(var1){
      echo 'hello world'
    }
  }
  stage('HW1b'){
    if(!var1){
      echo 'failure'
    } else {
      echo 'another hello world'
    }
  }
}

output:

hello world
another hello world