Loops and Lists

For Loops

Accumulating Values

A for loop runs the same body for each word in a list. Accumulators update one step at a time.

Program

Play the script to see n visit three values and total grow.

for_loop.sh 
#!/usr/bin/env bash

total=0
for n in 2 4 6; do
  total=$((total + n))
done
echo "$total"
for loop `for name in list` assigns one word at a time and runs the body.
accumulator An accumulator stores a running result across loop iterations.