Question

How to check if a number is a repdigit number (a natural number composed of repeated digits) in TypeScript

Answer 1

function isRepdigitNumber(num: number) {
    let str: string = num.toString();
    
    const arr: string[] = [...str];
 
    const st: any = new Set(arr);
    
    return st.size == 1;
}

const num: number = 99999999;
    
if (isRepdigitNumber(num)) {
    console.log("yes");
} else {
    console.log("no");
}

 
 
 
/*
run:
 
"yes" 
 
*/

 

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