code: func (c *Cell) SetFloatWithFormat(n float64, format string) {
  	c.SetValue(n)
  	c.NumFmt = format
  	c.formula = ""
  }
docs: /*
  	The following are samples of format samples.
  
  	* "0.00e+00"
  	* "0", "#,##0"
  	* "0.00", "#,##0.00", "@"
  	* "#,##0 ;(#,##0)", "#,##0 ;[red](#,##0)"
  	* "#,##0.00;(#,##0.00)", "#,##0.00;[red](#,##0.00)"
  	* "0%", "0.00%"
  	* "0.00e+00", "##0.0e+0"
  */
  // SetFloatWithFormat sets the value of a cell to a float and applies
  // formatting to the cell.