For example, the following command changes the file name extensions of all .gif files to .jpg:
Get-ChildItem *.txt | Rename-Item -NewName { $_.name -replace '.txt$','.log' }

You mean .txt to .log?

Document Details

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• ID: 41417680-da77-6c19-bbd0-522e694e7ff0
• Version Independent ID: fe731c19-4f99-e680-f508-ec28126ac605
• Content: about_Comparison_Operators
• Content Source: reference/6/Microsoft.PowerShell.Core/About/about_Comparison_Operators.md
• Product: powershell
• GitHub Login: @SteveL-MSFT
• Microsoft Alias: slee