Redirecting standard input\output in Windows PowerShell

What is the required syntax to redirect standard input/output on Windows PowerShell? On Unix, we use: $./program <input.txt >output.txt How do I execute the same task in PowerShell?

[igrep]

catしてpipeで読めってか。PowerShell, ちょくちょくカルチャーショック受けるわ。。。