how to rename a set of files in windows code example

Example 1: batch rename file

REM # | EXAMPLE (changes the "ChangeMyName.txt" file's name to "NameChanged.csv")
rename "C:/Users/JacquesK/ChangeMyName.txt" "NameChanged.csv"

REM # | SYNTAX
REM # | rename "" ""

Example 2: rename all files in a folder command line

for file in Picture*.jpg
 do
    mv "$file" "vacation-$file"
 done