how to fix npm ERR! Unexpected end of JSON input while parsing near '..."1.2.0","iterare":"0.' code example

Example 1: SyntaxError: Unexpected end of JSON input while parsing near '...version":"2.0.6","devD' cli

npm cache clean --force
then run npm i

Example 2: npm ERR! Unexpected end of JSON input while parsing near '...r\nComment: https://o'

npm cache clean --force
npm install -g @angular/cli