JavaScript - Repeat String
Repeat a given string str (first argument) for num times (second argument). Return an empty string if num is not a positive number.
Solution 1 using for-loop
console = {
log: print,
warn: print,
error: print
};
function repeatStringNumTimes(str, num) {
var newStr = "";
for (var i = 0; i < num; i++) {
newStr += str;
}
return newStr;
}
console.log(repeatStringNumTimes("abc", 3));
Output:
abcabcabc
Solution 2 using while-loop
console = {
log: print,
warn: print,
error: print
};
function repeatStringNumTimes(str, num) {
var accumulatedStr = "";
while (num > 0) {
accumulatedStr += str;
num--;
}
return accumulatedStr;
}
console.log(repeatStringNumTimes("abc", 3));
Output:
abcabcabc
Solution 3 Ternary Recursion
console = {
log: print,
warn: print,
error: print
};
function repeatStringNumTimes(str, num) {
return num > 0 ? str + repeatStringNumTimes(str, num - 1) : '';
}
console.log(repeatStringNumTimes("abc", 3));
Output:
abcabcabc
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