How do I increment a number under the cursor?

Explanation

The <C-a> command increments the number under or after the cursor by 1. It is a quick way to adjust numeric values without manual editing.

How it works

• <C-a> finds the nearest number at or after the cursor and adds 1
• Works with decimal, hexadecimal (0x), octal (0), and binary (0b) numbers
• Accepts a count: 5<C-a> adds 5

Example

port = 8080

With the cursor on the line, <C-a> changes it to:

port = 8081

Tips

• <C-x> decrements the number by 1
• 10<C-a> adds 10 to the number
• In visual mode, g<C-a> creates incrementing sequences
• :set nrformats-=octal prevents treating leading-zero numbers as octal