for Loop

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for Loop

for Loop

A for loop in Bash iterates over a list of words, a range with {1..5}, or a C-style numeric range with ((i=0; i<n; i++)). The classic form, for item in list; do ... done, is the most common style. Bash's for is more flexible than the pure counting loop found in many other languages.

Note: for i in {1..10} is a concise way to iterate over a fixed numeric range without a C-style loop.

Example: for Loop

bash

#!/bin/bash
for i in {1..5}; do
    echo "Number: $i"
done

for ((i = 0; i < 3; i++)); do
    echo "C-style: $i"
done

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Parameter Expansion for Length/Substring
The test Command
Search & Replace
Case Conversion
[[ ]] Extended Test
Trimming/Removing Prefixes & Suffixes
for Loop
Splitting a String Into Words
String Concatenation
Checking Substrings/Prefixes

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for Loop

for Loop

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