You are given a string s$1.$ You need to check whether a string contains only digits or not. If the string contains only digits then the string operation returns YES, otherwise, retur The function IsDigit$()$ accepts the parameters string s$1.$ Complete the function isDigit$()$ that returns the check digit in boolean format. Print whether YES or NO based on the

Example:

If the string s$1$ is $1232459$ then the string consists of only digits and hence the operation returns true. If the string$-$checking operation returns true then print YES, otherwise

Constraints:

$1<=$s$1.$size$<=1000$

Example $1$:

Input: s$1-34533$r$92384$

Output:

check$\_$string$=$ NO

Example $2$:

Input:

$$1=12098335272261$

Output:

Check$\_$string $=$ YES