int double code example

Example 1: default boolean value java

Default values for variable types:

Object = null
int, double, long, (etc) = 0
boolean = false
char = '\u0000'

Example 2: double char

#my own code

def doubleChar(str):
  lisp = list(str)
  out = []
  string = ''
  for i in range(len(lisp)):
    out.append(lisp[i])
    out.append(lisp[i])
  for i in range(len(out)):
    string += out[i]
  return string