Vim What? › Commands › c
c

The c command in Vim

Operator

change

Change operator — delete the text covered by the motion and enter insert mode. Double cc changes the whole line.
Examples
Related plugin

tpope/vim-surround — cs{old}{new} changes surrounding chars. e.g. cs"' changes " to '. || tpope/vim-commentary

Reference

Official Vim help for c →

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Related operators
d y ! = > <