JavaScript vérifie si un nombre commence par un autre numéro
<script>
// javascript program for the above approach
// Function to check if B is a
// prefix of A or not
function checkprefix( A, B)
{
// Convert numbers into Strings
var s1 = A.toString();
var s2 = B.toString();
// Find the lengths of Strings
// s1 and s2
var n1 = s1.length;
var n2 = s2.length;
// Base Case
if (n1 < n2)
{
return false;
}
// Traverse the Strings s1 & s2
for(var i = 0; i < n2; i++)
{
// If at any index characters
// are unequals then return false
if (s1[i] != s2[i])
{
return false;
}
}
// Return true
return true;
}
// Driver Code
// Given numbers
var A = 12345, B = 12;
// Function call
var result = checkprefix(A, B);
// If B is a prefix of A, then
// print "Yes"
if (result)
{
document.write("Yes");
}
else
{
document.write("No");
}
</script>
Crazy Caiman