Getting error while installing Angular Cli

183 http fetch GET 304 http://registry.npmjs.org/node-sass 1359ms (from cache)
184 silly pacote range manifest for node-sass@^4.3.0 fetched in 1365ms
185 silly resolveWithNewModule node-sass@4.7.2 checking installable status
186 verbose stack SyntaxError: Unexpected end of input at 1:21610
186 verbose stack ctories":{},“dist”:{“shasum”:"7381aa7869ce26d4b39a7bab71cf09e5a38432b
186 verbose stack ^
186 verbose stack at Object.parseJSON (C:\nodejs\node_modules\npm\node_modules\pacote\node_modules\make-fetch-happen\node_modules\node-fetch-npm\node_modules\json-parse-helpfulerror\node_modules\jju\lib\parse.js:745:13)
186 verbose stack at parse (C:\nodejs\node_modules\npm\node_modules\pacote\node_modules\make-fetch-happen\node_modules\node-fetch-npm\node_modules\json-parse-helpfulerror\index.js:10:13)
186 verbose stack at consumeBody.call.then.buffer (C:\nodejs\node_modules\npm\node_modules\pacote\node_modules\make-fetch-happen\node_modules\node-fetch-npm\src\body.js:96:50)
186 verbose stack at
186 verbose stack at process._tickCallback (internal/process/next_tick.js:188:7)
187 verbose cwd C:\Users\sravan\Desktop\Angular 2 ex
188 verbose Windows_NT 10.0.16299
189 verbose argv “C:\nodejs\node.exe” “C:\nodejs\node_modules\npm\bin\npm-cli.js” “install” “-g” “@angular/cli"
190 verbose node v8.4.0
191 verbose npm v5.3.0
192 error Unexpected end of input at 1:21610
192 error ctories”:{},“dist”:{“shasum”:"7381aa7869ce26d4b39a7bab71cf09e5a38432b
192 error ^
193 verbose exit [ 1, true ]