Go: package main

import (
	"fmt"
	"strconv"
)

func main() {
	for _, leftValue := range MultiplicationTableNum(9) {
		for _, rightValue := range MultiplicationTableNum(9) {
			strLeftVal, strRightVal, strMulti := strconv.Itoa(leftValue), strconv.Itoa(rightValue), strconv.Itoa(Multiplication(leftValue, rightValue))
			fmt.Println(strLeftVal + "x" + strRightVal + "=" + strMulti)
		}
	}
}

func MultiplicationTableNum(num int) []int {
	multiNum := []int{}
	for i := 1; i <= num; i++ {
		multiNum = append(multiNum, i)
	}
	return multiNum
}

func Multiplication(x, y int) int {
	return x * y
}

C++: #include<bits/stdc++.h>
#define FOR(i, a, b) for (int i = (a); i < (b); ++i)
#define REP(i, n) for (int i = 0; i < (n); ++i)
#define int long long
#define vec(a,n) vector<int> (a)((n));
#define Vec(a,n) vector<string> (a)((n));
#define twovec(a,n,m) vector<vector<int>> a(n,vector<int>(m,0));
#define Twovec(a,n,m) vector<vector<double>> a(n,vector<double>(m,0));
#define P pair<int,int>
#define All(a) (a).begin(),(a).end()
#define Sort(a) sort(All(a));
#define Reverse(a) reverse(All(a));
#define PQ(n) priority_queue<P,vector<P>,greater<P>> (n)
#define pq(n) priority_queue<int> (n)
#define print(a) cout << (a) << endl;
#define peintD(a) cout << setprecision(10) << ans << endl;
using namespace std;
int max_int = 1000000007;
void Debug(auto a);
int nibul(auto a,auto b);
int nibuu(auto a,auto b);
void input(vector<int>& a,int n);

int n,m;

signed main(){
    REP(i,9){
        REP(j,9){
            cout << i+1 << "x" << j+1 << "=" << (i+1)*(j+1) << endl;
        }
    }
    return 0;
}

void Debug(auto a){
    cout << "{ ";
    for(auto b: a){
        cout << b << " ";
    }
    cout << "}" << endl;
}
int nibul(auto a,auto b){
    int x = lower_bound(All(a),b) - a.begin();
    //key以上の初めてのitr
    return x;
}
int nibuu(auto a,auto b){
    int x = upper_bound(All(a),b) - a.begin();
    //key以下の最後のitr
    return x-1;
}

void input(vector<int>& a,int n){
    REP(i,n){
        cin >> a[i];
    }
}

C++: #include <iostream>

int main() {
  
  for(int i = 1; i <= 9; i++) {
    for(int j = 1; j <= 9; j++) {
      std::cout << i << "x" << j << "=" << (i*j) << std::endl;
    }
  }

  return 0;
}

C++: #include<stdio.h>

int main(){
	int x,y;
	for(x=1;x<=9;x++)
		for(y=1;y<=9;y++)
			printf("%dx%d=%d\n",x,y,x*y);
	return 0;
}

C++: #include <iostream>
using namespace std;

int main (){
  for(int i = 1;i <= 9;i++){
    for(int j = 1;j <= 9;j++){
      cout << i << "x" << j << i * j << endl;
    }
  }
  return 0;
}

C++: #include <iostream>
using namespace std;

int main() {
	// your code goes here
	int i=0,j=0;
	for(i=1;i<=9;i++){
		for(j=1;j<=9;j++){
			cout << i << "x" << j << "=" << i*j << endl;
		}
	}
	return 0;
}

C++: #include<iostream>
using namespace std;

int main() {
    for (int i = 1; i <= 9; i++) {
        for (int j = 1; j <= 9; j++) {
            cout << i << "x" << j << "=" << i * j << endl;
        }
    }
    return 0;
}

C++: a

C++: #include<iostream>
using namespace std;

int main(){
    for (int i = 1; i < 10; i++) {
        for (int j = 1; j < 10; j++) {
            cout << i << "x" << j << "=" << i * j << endl;
        }
    }

    return 0;
}

C++: #include <cstdio>
using namespace std;
int main(){
    int i,j;
    for(i=1;i<=9;i++){
        for(j=1;j<=9;j++){
            printf("%dx%d=%d\n",i,j,i*j);
            

        }
    }
    return 0;
}

C++: 
#include <iostream>
using namespace std;


int main(void){
//	FILE* fp_in = freopen("data.txt", "r", stdin);
	for(int i=1; i<10; i++){
		for(int j=1; j<10; j++) cout << i << "x" << j << "=" << i*j << endl;
	}
	return 0;
}

C++: #include <iostream>
#include <string>
using namespace std;

int main()
{
	int ans;
    for(int i=1 ; i<10 ; i++){
		for(int j=1 ; j<10 ; j++){
			ans=i*j;
			cout << i << "x" << j << "=" << ans <<endl;
		}
	}

	return 0;
}

C++: #include <iostream>

using namespace std;

int main() {
  for (int i = 1; i <= 9; i++)
    for (int k = 1; k <= 9; k++) cout << i << "x" << k << "=" << i * k << endl;
}

C++: #include<cstdio>
int main()
{
for(int x=1;x<10;x++)
{
for(int y=1;y<10;y++)
printf("%d × %d = %d\n",a*b);
}
return 0;
}

C++: #include <iostream>
#include <cassert>
using namespace std;

int main(void) {
    for(int r = 1; r <= 9; r++) {
        for(int c = 1; c <= 9; c++) {
            //assert(c > 9);
            cout << r << "x" << c << "=" << r * c << endl;
        }
    }
    return(0);
}