diff options
| -rw-r--r-- | README.md | 26 |
1 files changed, 15 insertions, 11 deletions
@@ -895,16 +895,23 @@ var=$((var2 > var ? var2 : var)) **Example Function:** ```sh +# Usage: is_float "number" is_float() { - # Usage: is_float "number" - case $1 in - *.*.*|*[!-.0-9]*) ;; - *[0-9].[0-9]*) return 0 - esac - - return 1 + # The test checks to see that the input contains + # a '.'. This filters out whole numbers. + [ -z "${1##*.*}" ] && + printf %f "$1" >/dev/null 2>&1 } +``` + +**Example Usage:** +```shell +$ is_float 1 && echo true +$ + +$ is_float 1.1 && echo true +$ true ``` ## Check if a number is an integer @@ -914,10 +921,7 @@ is_float() { ```sh is_int() { # usage: is_int "number" - case $1 in - *[!-0-9]*|'') return 1 ;; - *[0-9]*) - esac + printf %d "$1" >/dev/null 2>&1 } ``` |