在GitHub操作上设置操作输入时，是否可以创建if语句？

name: GitHub Actions

on:
  push:
    branches:
      - main

jobs:
  build:
    runs-on: ubuntu-latest

    steps:
      - name: Checkout code
        uses: actions/checkout@v2

      - name: Build and test
        run: |
          # 执行构建和测试的命令

      - name: Deploy
        if: ${{ github.ref == 'refs/heads/main' }}
        run: |
          # 执行部署的命令